Dust free is an issue with poly, as you have seen. Sand any rough spots on your bare-wood piece of furniture. equivalent to 0000 steel wool is harder to find. Working to a higher grit will make the polishing go quicker. Therefore, if you are looking to apply water-based poly formula over the stain, you should ensure that you sand the surface before you can apply your finish. You may have to let the board dry to see if you’ve got it right. 9. Now it is glassy smooth with super-tiny swirl lines in it. Wipe the piece with a tack cloth to remove sanding dust. Here are some supplies and tools we find essential in our everyday work around the shop. 1F (coarse) to 4F (fine). buff out to more than a satin sheen, let it sit for another When working edges, pay attention to the angle and rotation of the buffer, sharp edges of the top may catch the edge of the pad and cause kick-back of the buffer. Additionally, these formulas contain chemical solvents as well as curing agents. finishing options on scrap pieces of wood. week or two. The only drawback with poly is that it is (Finishing Forum) Water-based polyurethane does not last as much as their oil-based counterparts do. Use grain filler on open-pored woods, such as 3M packs of two finishing pads, 00 steel wool equivalent; The surface will have a silky feel to it and when viewed in backlight, should look like brushed metal. This reduces the surface tension of the water and allows it to “wet” the finish surface better. Other fascinating things about water-based polyurethane formulas are that they are fast-drying, which allows you to finish your projects in a short time. surface is really a mess). Let the second coat dry for at least 24 hours. Note: Abrasive grits referenced in this article are P (FEPA) graded. 220 sand paper 320 at the finest. Use these sample pieces to Alternatively, you can use steel wool.eval(ez_write_tag([[300,250],'woodcritique_com-medrectangle-4','ezslot_0',108,'0','0'])); Most, if not all, poly finishes contain no highly noxious chemical urethane; however, they are made using urethane polymers like polyethers and polyesters. For table and dresser tops, do the sides first, then start in the middle of the top and work your way out to the edges. If you have read this post, I hope you found it helpful and that your questions regarding sanding between coats are answered. Do not stir too vigorously, to minimize air bubbles. steel wool. Wad up a clean dry cotton cloth and working in whatever direction you want, polish every square inch of the board. Alternatively, you can use steel wool. This polyurethane type is mostly used on surfaces such as furniture, doors, tables, floors, and, . The greatest danger from rubbing through the finish topcoats occurs when you are leveling imperfections. wood with a clean, soft cloth until I stop getting dust Always brush from wet polyurethane into a non-coated area, to minimize defects in the finish. Usually, these formulas last longer than their water-based counterparts. Do any repairs as above, then level sand with 400 or 600. Rubbing to satin by hand is not that hard, but rubbing to gloss by hand is a lot of work. Do this 2 more times, switching to a fresh area of the steel wool for a total of 12-16 passes. Wet-dry silicon-carbide paper balls Squirt some soapy water on the board and then apply some steel-wool rubbing lubricant (Behlen Wool-Lube) on the pad or the board. If you intended to have your surface stained before the application of polyurethane formula, then this is where you should do the staining. You can even carry out the sprinkler test to confirm whether or not the structure has dried. make sure the finish is properly cured and ready to I always prefer to wet sand by hand, but if you want, switch to air-powered equipment for wet-sanding. Note: Product availability and prices are subject to change. The first thing you should do is prepare your surface for the application of a polyurethane formula. vertical surfaces. Stearated aluminum-oxide sandpaper Synthetic Steel Wool. This article will show you how to rub out any clear finish using both traditional and modern techniques. Moldings – Wrap some 800 grit wet/dry around rubber tadpole sanding blocks to approximate the convex and concave curves of the molding. Abrading and then rubbing these finishes destroys this effect and may not product adequate results. In case you didn’t know, your finish will be as smooth as your surface. However, the solution is entire surface with 4F-grade pumice. shellac and lacquer finishes, but it can work well on water- and oilbased If you wonder why polyurethanes are great for garage usage, these formulas can resist abrasion and other forms of impacts. These can be mixed with a carrier like water or oil by the user or are supplied in paste form, which is a mix of solvent and waxes. Some of the things you do in the preparation include cleaning the surface, especially if your wooden structure is not new. Save up to 68% on 7 issues of woodworking projects and tricks. 4. woodworking suppliers (see Sources, below). The last stage, polishing to the desired sheen, is done with steel wool, synthetic steel wool and abrasive powders. Use long strokes, from one end of the piece to the other, overlapping each pass slightly until the entire piece is coated. 8. Therefore, ensure that you use papers with lower grits, start with a 100-grit and follow it with a finer paper at 150-grit. I polished out the minor imperfections (dust particles, etc.) Several newer papers are available which are worth trying. This is where At this point, you must be fully aware that nothing serious happens to your finish if you fail to sand between the coats of polyurethane. These mineral powders are composed of sharp, angular fragments that scratch the finish. So that you are sure the surface is dust-free use a tack cloth to wipe it. that are visible through subsequent layers of poly. I would lay down a barrier coat of shellac to isolate any missed wax contamination. Types of Polyurethane Finishes. Having worked with polyurethane formulas for over 15 years, I prefer the brush-on method with less costly and disposable foam brushes or bristles. sheen with no visible defects. 5. If there are shiny spots around the edges and close to the edge, take some 0000 steel wool and using it dry, rub the surface until it’s dull like the rest of the surface.