Apply a THIN coat of Minwax® Fast-Drying Polyurethane using a high-quality natural or foam brush. The paint and Polyurethane will mix and fill the layers, any holes, and printed flaws. After final coat rub out with 0000 steel wool and wax with carnuba. Unsanded wood is hard, bumpy, and often unpleasing to the eye. Step 13 Apply two sealer coats of polyurethane mixed with mineral spirits to the underside of the piece of furniture if it is made of traditional hardwood lumber. The final one is the polishing coat: many users use PU to create the glossy surface for wood products. Ultra-smooth surface is inevitable in terms of getting an excellent finish. How do you make a matte finish with polyurethane? Pop any bubbles you see by brushing back over the finish. It came out great. Do not buff the final polyurethane finish coat. ; Start with 120-grit sandpaper on refinished pieces and 80-grit on new wood. I waited 20 minutes between layers and then waited an entire day before spraying the final coat of spray paint to cover any discoloration. What do you do after you apply the final coat of polyurethane to smooth out the imperfections? Move in the direction of the wood grain. Hand Rub With Wipe-On Varnish or Oil If you want to transform the sheen from high gloss to satin or matte, then using a hardening oil such as tung oil is a good way to do it. I am primarily doing this on decent sized flat surfaces, 5-6 sq/ft. You apply the final coat, let it dry and you're done. Thin coats will result in you burning through the top layer. Find a paint brush that is super soft to apply it. I used a gel stain for color and then I have applied 3 coats of Varathane polyurethane with a satin finish. There’s a running debate on whether or not you should apply your clear coat over your vinyl decals. If you notice significant bumps in the dried coat, use a razor blade to shave these off. How to Sand Out Bubbles from your finish. Let the polyurethane sit for about 10 minutes after stirring to allow the foam to settle. If third coat is desired, repeat step 5 before application. Applying polyurethane in even coats is a crucial, though not always simple task. There are always some little imperfections and spots. Intercoat abrasion with a multi-disc and 220 grit sandpaper Polyurethane wood floor finish tip: When you abrade your floors, make sure you buff out any dust, particles and bubbles, before cleaning and tacking. If you miss the bubbles when the polyurethane is still fresh, you can even get rid of them after the finish has dried. I prep sanded the wood using 80 grit and worked up to 220 grit. Brush marks often show up on pieces of furniture treated with polyurethane finish, usually despite the best efforts of the craftsman. Then lightly sand entire surface with fine sandpaper (220 grit) to ensure an even finish and proper adhesion. The problem is easily fixed. Step One – Use 120 grit or finer sandpaper to scuff sand the bubbles. Any slight specs after the final coat will be rubbed out. For hardwood floors, there are more coasts of PU than normal ones. If you do not sand the primer appropriately, you might have blotchy stains on the piece when you apply the final coat of paint. Then we buff with an abrasive pad. How do you polish these few imperfections out of polyurethane after the final coating to still maintain a high-gloss, smooth finish? Heating, dropping rocks and chiseling the wood. This will create the impression that you sprayed all the coats and give the finish a … There are specific rules to be followed in applying any finish, whether oil or water based. Before my "final coat", even if my previous coat was perfect, I sand with 400-600 and 0000 steel wool to make it silky smooth before that last coat. Lightly sand in between poly coats. Polyurethane is the modern product most often used as varnish, or clear finish, on stained and painted wood surfaces. A good-quality natural-bristle brush, a reasonably dust-free, well-ventilated space and some patience are all you need. Getting a smooth, blemish-free finish with oil-based polyurethane is within your grasp if you follow the steps in this article. Take your time, like the pros do, and you'll create a durable, smooth, lasting finish. Apply a full-strength final coat. Do You Sand the Final Coat of Polyurethane? While it’s good practice to use fresh varnish, I recently used some that had been sitting around for 15 … Now that the coat is dry, you can lightly sand its entire surface. How many coats of polyurethane should be put on hardwood floors? Primers can often be thick and difficult to clean up. If your kitchen table is made of oak or ash, take a wood grain filler and apply it before the poly. For polyurethane, you’ll probably apply five to ten coats. Our 8-step approach shows you how to apply the varnish successfully. A gloss finish since it is free of flattening compounds is clearer. 7. This Site Might Help You. Typically, two to three coats are used with sanding in between coats to even them out. No matter how many coats you add of Polyurethane, the look will still not be completed. How do you get that hard smooth finish? So we “rub out” the final coat to make it smooth and flat. Three plus will get a smother finish. You can apply it and leave it (if you have a good dust free environment) this will leave you with the best sheen, or you may need to do a final buff out with very fine sandpaper 400 grit, then buff out with a rag, this will leave you with a very smooth “hand rubbed satin” finish. Similarly, if you want an impressive final finish, the wood surface has to be smooth and clean before applying the poly. I'm not really a fan of poly, I find it dies too quickly. Take 220 – grit paper to sand the wood. After the first coat, all you are trying to do is remove the bumps and scuff the surface for the next coat, so 220 is just too rough. I personally prefer using a small foam roller and foam brush' Smooth finish, no brush marks. This removes the high spots, the embedded dust, the laps, etc. Final Finish. If a second coat is needed (and I usually advise at least 2 coats for normal furniture and 3 coats for high traffic or areas around water), you will want to sand, vacuum and tack cloth the piece between coats. However, do not worry if you have applied polyurethane coats unevenly. However, you do not want to sand the final coat or you will end up with a … Sand the coat lightly with 220-grit sandpaper when dry. RE: How do I smooth out uneven brush strokes in polyurethane? Normally, the property of the floor surface also affects to the finish paint quality. It levels out so nicely. I prefer the 320 grit between coats. But large bubbles formed in the second coat about 10 minutes after I applied it. As for figured cherry, there should be no reason to pore-fill. This ensures the protectant goes on smoothly and actually provides a finished look. With water-based polyurethane finishes, you generally don’t have to buff after each coat to achieve adhesion if it is applied within so many hours. The thinner each layers and the longer you let each layer dry the better. If you don't have a soft enough brush or it's too hot or you don't work it fast enough then you are left with a bunch of brush marks to contend with. A: Professionals sometimes find water-based urethanes hard to apply. Oil-based polyurethane varnish brings out wood's natural beauty and grain. The finish should feel smooth and flat, no bumps. The first coat on the top looked good too. Remove all dust. After the final coat dries for 48 hours or more, we wet sand it with water and 400 grit sandpaper. Varathane Professional Interior Varnish is my #1 pick right now. For the final coat, if I really want a smooth coat, I will use a spray can, just for the last coat. This will ensure a super smooth finish. If you are going to do that you might as well use a gloss finish. Instead, it would be best if you sprayed it or spread it in a nice and level way. Any slight specs after the final coat will be rubbed out. Always stretch the polyurethane as thin as you can. I am staining and finishing oak doors for the first time. Do this by sanding out the bubbles then apply a fresh coat of the product. Try to get the "non-filling" type, like the waterproof or aluminium oxide. You really want that final layer of finish to be thick enough to withstand the rubbing out process. A little test of how well polyurethane works when there are 40 coats. I like to use a green Scoth Brite pad. For a smooth coating you’ll want the surface to be as smooth as possible, so prepare the wood by sanding it with a sanding block or orbital sander. Do not sand the paint before applying poly. At least three coats of poly. Just as you did with the initial coats, brush the polyurethane onto the surface, working systematically from one side of the project to the other. How Long Do You Let Polyurethane Cure Before Wet Sanding?. I've sanding, conditioned, stained and so far have applied 2 coats of satin polyurethane. Otherwise, it will show through on your next coat. Apply second coat. If you really want that mirror finish, spray the final coat. In the photo below, you can see what we are looking for when buffing. How to Remove Brush Marks From a Polyurethane Finish . It is best to sand your wood before any coats are added. Oil-based polyurethanes are easy to apply but take too long to dry while water-based polyurethanes usually require multiple applications and have a whitish consistency upon application which disappears once dry.. Water-based polyurethane also tends to dry faster. Let dry 4-6 hours. You'll want to cover your wood furniture item with several coats of protective polyurethane. You’ll get the best results from your topcoat if you remove any old paint, varnish or other finishes before polyurethane application. Rubbing out the finish you would re-create the satin by scuffing the finish with 0000 steel wool. Aim for a smooth, uniform finish. If you are going to brush it do it sometime when the temperature is under 90. Overall, Polyurethane is the easiest form of finish that even first-timers won't have difficulty in applying. So I sanded them out and brushed on a new coat. Wood pieces that are not completely sealed with polyurethane can warp because moisture can enter the wood through the unsealed surface. After your final sanding, apply your final finish coat. Wait for drying So, the spots are too noticeable for this type of project. There seems to be a lot of controversy on a rough first coat of polyurethane and what to do about it. After I stripped, sanded, and stained my solid-oak kitchen table, I brushed three coats of polyurethane on the underside. No, you are not supposed to sand the final coat. Several light coats will get you a smooth finish. I am in the process of redoing a bureau. So, my final coat is not mirror smooth. I’d go with about 5 coats. But, you always have to buff it once. Sanding removes the lines and ridges created by the … Is one coat of polyurethane enough? If this is your first time working with Varathane, there may be some uneven spots. However, there is a way to remedy these flaws without undoing a day's work. So brushed-on coats of a standard varnish would do the trick nicely. Dip your brush gently and take your time painting the surface. I didn’t shake the can, and the brush didn’t leave any bubbles behind. Make sure that you have plenty of mineral spirits on hand to clean up your brushes and any type of mess that you create. After 40 plus years of finishing doors, woodwork, furniture etc I can tell you what I use and it's easy and comes out baby butt smooth. When you sand and rub out the final finish you take off most of the surface which contains the satin. This step will remove any rough patches and give the piece a smooth finish. You should ensure that you sand the previous coats so that you create a perfectly level and even base for your final coat. You can use a belt sander on larger projects, or sandpaper by hand on smaller wood items. No sanding required. The wiping poly is the easier product to get good results short of spraying the finish. 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