If you believe that the surface was painted with lead-based paint, take precautions to avoid breathing or otherwise ingesting the paint dust. Then, apply a layer of Oil Bond on to the cleaned surface. The objective of sanding wood is to remove mill marks, which are caused by woodworking machines, and to remove other flaws such as dents and gouges that may have been introduced in handling. I used sugar pine because it is very light in weight. Sand with the folded sandpaper until it dulls, flip the folded sandpaper over to use the second third, then refold to use the third third. Be sure to start any painting project by sanding your surfaces with 150-grit sandpaper. The process is called sanding because the main element used for wearing out the fibers is sand. Drape plastic sheeting over the floor or other work surface to protect it from paint spills. Restoring a painted wood floor is time-consuming, so be sure to set aside several days for completing the necessary steps and several more for your room to be off-limits to traffic. When sanding wood, it’s recommended to be a bit more methodical approach of starting at 100 grit sandpaper and progress upwards. To get paint to adhere to wood, you have to sand it, to rough up the surface. Distressing painted wood is easy when you have the right tools. Start with a coarse aluminum oxide or garnet sandpaper and end with a finer (80, 120, 180, 220) sandpaper. Sanding can be a tedious process, but it is vital to the overall quality of the woodworking project. http://www.woodworkingbank.com. 1. Roll the paint onto the wood, beginning with light pressure only. Preparing exterior wood for painting isn’t difficult, but it does require some prep work to ensure that your new paint has a smooth, stable surface to adhere to. Let the sander’s weight do the work. Fine sanding. A 40-80 grit sandpaper is the one that is used when you are sanding or removing stock... Understanding the importance of sanding. How to Apply a Paint Finish to Wood ProjectsHow to Apply This Finish1. The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. Compressed air works well if you have a good exhaust system, such as a spray booth, to remove the dust. Note: A coarser-grit paper will remove more than necessary (use 80- to 120-grit to smooth imperfections such as heavy globs of old paint). In all cases when sanding by hand, it’s best to sand in the direction of the wood grain when possible. When the wood is clean and smooth, use a latex-based primer especially made for exteriors to prepare the surface for a new coat of paint. When to Sand, Before Painting? A good paint job is all in the prep before you even touch a paint brush. First paint the wood. No matter which of the three sanding methods you use, always remove the sanding dust before advancing to the next-finer grit sandpaper. Sand All Surfaces to Remove the Shine. Dip a cloth in the water, firmly squeeze it dry, then wipe down the wood to remove all oils, dirt, and grime. Wet sanding is a great way to improve a good paint job and can even be used to help improve the quality of a poorly laid paid layer. Sanding wooden surfaces . Apply a final coat of paint, using a brush and/or roller, as desired. Wipe the surface of the entire table using the tack cloth. Use a flat block to back the sandpaper if you are sanding a flat surface. 1. As in the example mentioned above, if you're working with a rough piece of wood like palette wood or old, worn-out wood, make sure you put it through several grits of sandpaper … If you can’t avoid cross-grain sanding, you will have to find a compromise between creating scratches fine enough so they don’t show and coarse enough so the stain still darkens the wood adequately. Yes, you can paint over stained wood without sanding, as paint can adhere to stain. Sand any bare wood to 120-grit and no finer. Then open the sandpaper and wrap it around the block to use the middle. If the outside paint layer is gummy, use a “clog-resistant,” or “self-lubricating,” sandpaper (such as 3M's SandBlaster paper). Using your hand to back the sandpaper can lead to hollowing out the softer early-wood grain on most woods. The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. After the paint dries a few minutes and before the paint dries completely, take a scraper or credit card, and scrape off some paints at random spots. Liquid sandpaper dulls a glossy surface, with far less effort! Cross-grain. I’m not here to guarantee that you will have a great, or a horrible outcome painting your wood floors without, or even with, sanding. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. To get paint to adhere to wood, you have to sand it, to rough up the surface. We may receive a commission when you use our affiliate links. Sand the surface to 320-grit. However, for the best results, you should use the primer or Oil Bond method to clean the area you want to paint using a rag. Click here to Pin this post for later. This is an excellent entry level sanding article! Simply move the sander slowly over the surface of the wood in some pattern that covers all areas approximately equally. To get the most efficient use of the sandpaper, fold one of the thirds-of-a-sheet in half along the long side and hold it in place on the block with your fingers and thumb. 3. Photo 4: Use a sanding sponge to sand the filler. Tackle large, flat ares with a disc or orbital sander, and use a trim or palm sander on more delicate surfaces. 1. Get the Right Gear. For surfaces that have large, flat areas, incorporating a high-density foam roller will help you get the job done more quickly. This can call for a slightly rougher grit like a 150 grit paper and then slowly progress toward the finer grit papers for your new primer. Sand your furniture piece smooth. Drape plastic sheeting over the floor or other work surface to protect it from paint spills. Optional: Apply a wood conditioner according to the directions on the package. Continue until you get the distressed look you want. For more details, see our, How to Refurbish Particleboard Furniture With Paint, How to Paint Melamine and Laminate Surfaces. At this point, after the wood has dried, check the piece for large nicks, gouges and scratches. Distressing wood 101. Be careful not to gouge the surface though: You're just looking to rough it up a little so the primer has something to adhere to; you're not trying to strip the surface. Sand the painted surface with 100- or 120-grit sandpaper or a medium sanding sponge. Sanding block. Put on eye protection and rubber gloves. Protective goggles. While sanding a wall or a wood surface (like of your old furniture) can be a bit of hassle and time consuming, the process can be made easier if you make use of a right sander device for your project. This is a single-stage paint, meaning that there is no clear coat, the paint applied is the color and finish coat all in one. I generally use a power sander with medium grit sandpaper (like a 120 grit) on it when I sand furniture. ), but sanding it first can be a real pain. And that rationale makes sense. Start with a rough sandpaper grit, such as 80 grit, and begin to sand the wood. And there’s obviously lots more moisture (steam! Save up to 68% on 7 issues of woodworking projects and tricks. Sanding always improves paint adhesion, so consider sanding the entire wall. Here are some supplies and tools we find essential in our everyday work around the shop. For example, a board that has been run through a planer with dull knives will require a coarser grit to be efficient than typical veneered plywood or MDF that has been pre-sanded in the factory. Sanding pre-painted wood is done to both remove any loose and flaking paint, but also to scratch the surface, creating a 'key' for the new coat of paint to attach itself to the old one – this is especially important with gloss paint which has a very shiny surface and will need a good deal of sanding. Sanding using sandpaper is one of the most popular ways to age wood. The conditioner partially seals the grain so that the stain won't be blotchy. Use a light touch, work on a large area, and keep the sander constantly moving to prevent gouging the wood or creating visible waves. Avoid mineral spirits if you are going to apply a water-based finish because any oily residue from the thinner might cause the finish to bead up. The best policy is to always sand in the direction of the grain when possible. Sanding and polishing clear coat overspray. The best tool to use is a vacuum because it is the cleanest. This is also a good time to scrape any old, flaking paint off and to sand down old paint lines. 2. Then, remove the sanding dust and apply a suitable primer. The idea is to build up a thick layer of finish, then polish it smooth with fine-grit sandpaper. This will give the primer good “tooth” to hold on and create the right base to start with. Transfer the paint to the wood, dragging the brush in short strokes that run parallel to the wood grain. Gently dab the roller into the paint. Recommended Grit Sandpaper Before Painting Wood. Home Wood and Supplies Sanding and Abrasives. However, for the best results, you should use the primer or Oil Bond method to clean the area you want to paint using a rag. Always use a dust mask when sanding. Other than using a stationary sanding machine or a belt sander, which will take a good deal of practice to learn to control, there are three methods of sanding wood: with just your hand backing the sandpaper, with a flat block backing the sandpaper and with a vibrator or random-orbit sander. High-density foam roller covers tend to trap paint in the roller pad, so you may have to gently increase pressure to release the paint. If you would like to avoid using phosphates (which are banned in many communities), use a TSP substitute instead. The dream of a glass-smooth tabletop is always spoiled by brush marks and bits of dust and other debris. Any wood will work. Here is a most common way to distress painted wood: using sandpaper. The most efficient use of sandpaper for hand-backed sanding is to tear the 9″ x 11″ sheet of sandpaper into thirds crossways, then fold each of these pieces into thirds lengthways. Unless all traces of sawdust and sanding dust are first removed, any finish you apply—whether it is a coat of paint or stain-plus-topcoat—is doomed to be imperfect.Although the finest dusts are virtually invisible to the eye, if they are left on wood surfaces when you apply paint, stain, or varnish, the surface will turn out muddy in color and rough to the touch. But there are two methods you can use as an aid. Oil and oil/varnish-blend finishes have no measurable build, so any roughness in the wood caused by coarse sanding telegraphs through. The sanding scratches won’t show as long as they are in the direction of the grain. I refer to these as “squigglies.” The best policy is to sand them out by hand in the direction of the grain after sanding to the finest grit, usually #180 or #220, with the sander. Yes, you can paint over stained wood without sanding, as paint can adhere to stain. It’s a life changing product that has been around for years, but I just never noticed it nestled in on the shelf at the home improvement store. Sanding allows your wood to be fully prepped to accept both primer and paint. I made my own sanding block. Convention will tell you to sand the floors because it scuffs them up, giving the paint something to stick to. Optional: Apply a wood conditioner according to the directions on the package. So you shouldn’t use your hand to back the sandpaper on flat surfaces such as tops and drawer fronts because the hollowing will stand out in reflected light after a finish is applied. Random-orbit sanders are more efficient than vibrator sanders, but they still leave cross-grain marks in the wood. For highly irregular surfaces, such as furniture, crown molding, and trim, it is best to use a paintbrush only. Dwell time: 30 minutes to 24 hours Removal: Scrape off the paint with a plastic scraper, and use an abrasive pad and mineral spirits to remove any lingering residue. Denatured alcohol will raise the grain a little, so you’ll have to sand it smooth again. Thoroughly remove sand… Begin with a shop vacuum outfitted with a brush attachment. Kudos to Bob! Sand down any spots where you applied wood putty to ensure the surface is level. So you don’t want to begin with too coarse a grit because it will cause you more work than necessary sanding out the scratches. Starting first with this Ranger that I repaired the cab corner on. For wetting the wood, use mineral spirits (paint thinner) or denatured alcohol. You can finish-sand both of these surfaces with #180 grit, for example, but you might begin with #80 grit on the solid wood and #120 grit on the plywood. If the block is hard (wood, for example), it’s best to have some sort of softer material such as cork glued to the bottom to improve the performance of the sandpaper. This is a very important concept because it gets past all the contradictory instructions about which sandpaper grits to use. It’s rarely beneficial to sand finer than #180 grit. Pretty much just like painting with the wood grain – paint with the previous paint strokes. Roll the paint up and down the slope of the tray a few times to distribute the paint on the roller pad. Here is a guide to help you distress wood with sandpaper. Some situations, however, benefit from a sealer. With that said, picking the right set of power tools can be quite challenging, especially for a nerd. Just get the wood clean enough so you can’t feel or pick up any dust when wiping your hand over the surface. Let the primer dry completely, then sand it down before painting. Then switch to fine sandpaper (200+ grit) until the entire piece is uniform. Mix a solution of TSP with warm water to the proportions recommended by the manufacturer. Seven steps to a heavenly finish. How to Sand and Restain Painted Wood Furniture. Sandpaper and power sanders provide another quick way to remove old Allow the air to clear so it won't leave dust on your freshly painted surface and then gently wipe off any dust that settled on the wood surface. We all sand with different pressures, number of passes over any given spot and lengths of time. Keep a wet edge at all times to prevent lap marks. Whether you're a beginner or you're a regular do-it-yourselfer, our checklist will take your paint job from "good" to "amazing." A brush kicks the dust up in the air to dirty your shop and possibly land back on your work during finishing. After you have removed a majority of the dust with the shop vacuum, use a tack cloth or a cotton rag that has been dipped in water and thoroughly squeezed out to remove the remainder of the dust. Using a medium-grit sanding sponge, scuff corners, edges, and details where the piece would naturally show wear, letting the underlayer of paint—and even a bit of raw wood—peek through in spots. Using 220-grit sandpaper, sand gently by hand, or attach the paper to the orbital sander and run it extremely lightly across the surface. Clean the entire surface with soap and water or a pressure washer to remove any dirt and grime that’s built up over time. Sanding by hand in the direction of the grain to remove these squigglies then becomes unnecessary. Use a 1-inch brush to apply two to three coats that completely cover the wood surface, allowing the medium to dry to the touch after each coat. Apply a coat of wood conditioner to open grained wood such as pine or fir. Pull the scraper in the direction of the wood grain, and use finesse and elbow grease to "rake" the paint away but not gouge the wood; Scrape until the remaining paint won't budge and you have nice, crisp (but not sharp) edges in the details of the wood. Sandpaper. That said, in my experience thus far (at the time of writing this post my floors have been painted for four months), painting without sanding has worked just fine… Once you master these wood sanding techniques, you'll be able to prep your projects for a great finish. Wet-Sanding. Go a step further and apply a clear polyurethane over the painted surface to help protect the paint, as well as the underlying wood. It’s a lot easier doing this than sanding the wood through all the grits to #400 or #600. Zirconia alumina is suitable for wood, fiberglass, metal and painted surfaces. In this case, the top half was sanded to #180 grit and the bottom half to #600 grit. Instructions Cover Your Work Surface. Photo 5: Mark imperfections in the wall. Wipe down the whole surface with a tack cloth to remove any dust from sanding. But for those willing to take the time, brush-bound finishers can still achieve a perfect surface. Introducing "One Thing": A New Video Series, Roller assembly with a high-density foam cover, Paint additive such as Penetrol or Floetrol (optional). ), but sanding it first can be a real pain. Let the paint dry as directed. Apply Paint Color; Step 1 - Sand Your Wood Thoroughly. 3. You can usually achieve an even smoother coat if you opt to sand and paint one final time. This process prepares the surface for maximum adhesion. Use very fine 220-grit sandpaper, and apply light pressure to prevent gouging the primer. You won’t see any difference under a finish, or under a stain and finish. I really find them to be very helpful for my new projects. Cross-grain sanding scratches aren’t very visible under a clear finish, but they show up very clearly under a stain. (See “What Is Oil?” in issue #154, April 2006, for a more thorough explanation of both processes.). It’s a great alternative to sandpaper that provides that same “rough” surface for paint to adhere. Clean the Wood Surfaces. It’s not necessary to get all the dust out of the pores. Sand the project up through the grits to150-grita. If necessary, fill them with a wood filler using a flexible putty knife. Get it free when you sign up for our newsletter. Floor work is a hands-and-knees endeavor, so invest in knee pads. In fact, the finer the grit the wood is sanded to, the less color a stain leaves when the excess is wiped off. Also, make sure that the shop vacuum is fitted with a bag and a filter to minimize airborne dust. Within just a few hours, you can transform yourself from an amateur weekend painter to a professional-quality painter. Transfer the roller to the wood. I love this gently weathered wood look! Sand Your Primer. Filter mask. Tip: Use 80-grit if you are sanding a furnishing with an existing varnish. Wipe each area with a tack cloth to remove sanding dust and keep the paneling clean. Most woodworkers use random-orbit sanders because they are very efficient, easy to use, and they leave a less-visible scratch pattern than vibrator sanders due to the randomness of their movement. This allows the paint to grip the surface, especially with anything that’s varnished. 2. Wipe the surface of the entire table using the tack cloth. This will take the … Wait two days to allow the paint to dry completely. It covers probably 99% of all sanding issues. For flat surfaces, switch to the roller to speed up the process and to provide a smoother finish. Painting over a stain and clear finish is much easier that the reverse -- staining and finishing over previously painted furniture. If it isn’t, there’s no point going past #180 grit. A fresh coat of paint can give almost any wooden piece, such as furniture, cabinets or room trim, a much needed face-lift. Wipe … Being sure that these flaws and scratches are removed is the reason most of us sand more than we need to. Some painters skip this step, but it depends on the type of paneling you’re painting. This allows the paint to grip … Painting wood appears to be such an elemental, foolproof project that many people rush the job along or attempt shortcuts that produce poor results. Active ingredient: N-Methyl-2-pyrrolidone (NMP) Strength: A ⅛-inch coat removes up to seven layers of paint. You can then sand the entire surface to give it a more textured surface that your paint will easily stick to. Exterior Sanding. If possible, let the piece dry overnight or longer before using it. It would be a total waste of time and effort to begin with #80 grit on the pre-sanded veneered wood (and you would risk sanding through). For most of us, finishing means applying varnish, polyurethane, or paint with a brush. There are times that I will recommend sanding before painting. Before staining or painting, sanding is very important; otherwise, they would not stick to the wood properly. Conditions vary. Sand the wood in flat, smooth areas of wood with a random orbital sander and 180-grit sandpaper, wearing a dust mask or respirator and hearing protection. Here's how.1. Painting wood furniture has to be one of the best ways to transform it on a dime (hello, flea market finds! How to get a Smooth Finish with Wet Sanding. Rinse the area with clean, warm water and a clean cloth. The biggest sanding challenge is to know when you have removed all the flaws in the wood and then when you have removed all the scratches from each previous grit so you can move on to the next. Decoupage medium can be used on small painted wood projects, such as decorative plaques, trinket boxes or picture frames. Sand to Finish Photo by Wendell T. Webber. Sanding is easy to do and sandpaper in different grits is available in all hardware stores and hobby shops. Pressing leaves deeper and more obvious squigglies that then have to be sanded out. Sanding the first paint coat brings down bumps and inconsistencies introduced by the roller or brush. But these finishes can be made ultimately smooth simply by sanding between cured coats or sanding each additional coat while it is still wet on the surface using #400- or #600-grit sandpaper. Wood dust from sanding will cause problems if it's not removed from the surface before staining. in a kitchen than, say, a bedroom where you may want to paint a wooden dresser. Make sure to eliminate all ridges. Primary sanding of rough wood and the removal of planning marks on wood is often best done with medium-grit sandpaper. If anything is more important, it is to clean the surface thoroughly after sanding as the process accumulates a lot of dust. Film-building finishes, such as varnish, shellac, lacquer and water-based finish, create their own surfaces after a couple of coats. You can opt-out at any time. “The problem with sanding down to the wood is that it creates the potential for moisture to seep in or out of the wood,” says Chris. Learning how to master the techniques of high-quality painting of wood surfaces is not difficult, but it does take some practice. Bob Flexner is the author of "Flexner on Finishing," "Wood Finishing 101," and "Understanding Wood Finishing. In the following articles, learn how to sand wood through a variety of methods, from hand sanding to using specific types of power sanders. This method reduces waste to zero and also reduces the tendency of the folds to slip as you’re sanding. The primer will have a chalky feel and appearance but this will be smoothed over by the paint. Sanding Wood That was Previously Painted If your wood has been previously painted you will typically sand but not necessarily to fix issues with raised grain but to help promote adhesion. (I find the rubber sanding blocks, available at home centers, too hard, wasteful of sandpaper and inefficient because of the time involved in changing sandpapers.). Wonderful well-research work. Find Paint Products Sand the table, beginning with the coarsest-grit sandpaper (100 grit) and sanding in the direction of the wood grain. Sand the table, beginning with the coarsest-grit sandpaper (100 grit) and sanding in the direction of the wood grain. Wet-sanding also helps to prevent the sandpaper from clogging with dust, remove loose abrasive particles and reduce airborne dust. What is a week or two when a good paint job will last decades? Dab the end of the paintbrush bristles only about 1/4-inch into the paint each time you load the brush. Then a stain was applied and the excess wiped off. Sanding and polishing clear coat overspray. Spot-prime the filler and any bare wood. Subscribe ». Only if you are staining or using a vibrator (“pad”) or random-orbit sander does sanding above #180 grit make a difference. Fine sandpapers range from 120- to 220-grit. Go a step further and apply a clear polyurethane over the painted surface to help protect the paint, as well as the underlying wood. Sand the Flat Areas. To remove those last bits of finish, palm sand with medium sandpaper (150 grit) until you see the bare wood. 2. Second, wet the wood then look at it from different angles into a reflected light. Step down your grits and finish with an ultra-fine grit. A lot of knowing when you have sanded enough is learned by experience. Doing this is especially important if you are staining. Truth is, any film-forming finish works as a "sealer" because it closes off the pores of the wood and lays a base for the topcoats. Hearing protection is essential when operating the oscillating sander. Sanding is very personal. … Citristrip: This wood stripper is an orange gel, best on furniture details and flat surfaces since it is thin. The objective of sanding wood is to remove mill marks, which are caused by woodworking machines, and to remove other flaws such as dents and gouges that may have been introduced in handling. Next, sand the table with the 150-grit paper, and finish by sanding with the 220-grit paper. Overspray essentially is when a painted surface is dry and new wet paint … If you routinely apply sanding sealer before finishing, you may be taking an extra, unnecessary step. For most of us, finishing means applying varnish, polyurethane, or paint with a brush. If the piece you are painting has any rough spots, like let’s say you’re painting new wood, then you need to sand those spots smooth before painting as well. Sanding finer than #180 or #220 is wasted effort in most cases, as explained in the text. Hand-sand all woodwork smooth with a fine, 180-grit paper until all shine disappears. The intent is not to strip the wood of all of the coatings and stains but simply to smooth out the surface and provide some "tooth," or slight scratches, to help the paint bond. First, after removing the dust, look at the wood in a low-angle reflected light – for example, from a window or a light fixture on a stand. However, this does not impact our recommendations. These squigglies then becomes unnecessary using the tack cloth, a sticky of... Paint before it dries bunch it up but keep it loose, polish... To stick to over by the manufacturer we find essential in our work... Different grits is available in all cases when sanding wood, and finish by sanding surfaces... Open the sandpaper wipe the surface when you sign up for our newsletter without overspray very.. Give it a more comfortable grip but this will press the tack cloth, bunch it up but it! Look you want, then sand the floors because it gets past all the contradictory Instructions about sandpaper... Experience in construction, home building and remodeling, and commercial building stick... Pressing leaves deeper and more obvious squigglies that then have to be one of the wood.. ), use mineral spirits ( paint thinner ) or denatured alcohol sand and one... With dust, remove loose abrasive particles and reduce airborne dust and finish with wet sanding given. Spoiled by brush marks and bits of dust and other debris but most of us finishing. Look you want, then lightly run it across the surface is dry and new wet paint is sprayed and... Take some practice bits of dust be disguised by the roller to speed sanding painted wood the tack will. The sandpaper see our, how to get a smooth base, you have sanded enough is learned experience. 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Brush-Bound finishers can still achieve a perfect surface with 100- or 120-grit sandpaper or a medium sponge...