Apply only one thin coat. Then, remove any dust nibs with 1,500-grit sandpaper or a piece of brown paper bag. Finally, using a soft cotton rag or polishing pad, buff the finish to a high shine using automotive paste wax, photo below, which has fine abrasives that polish the finish even further.
How to Polish Polyurethane. Saturate a 1000-grit sheet of wet/dry sandpaper in a bucket of water. Sand the surface of the polyurethane with the sandpaper, using small circular motions to remove any imperfections from the surface. Clean the surface with a pH-neutral cleanser and a sponge to remove any sanding debris.
I am trying to get a mirror polyurethane finish, but no matter what I do I continue to have problems. My biggest issue is that once I rub out and polish my project,. I have wetsanded my projects down again (not to bare wood .
These tips and techniques for applying oil-based polyurethane produce virtually. I like to use an old, clean cotton T-shirt for this and the wipe-on step shown later.. With a solid wood top like this one, finish both the top and the bottom .