Polishing Polyurethane With Steel Wool. You can also use a section of 0000 steel wool to buff the surface.18 x research source. 0000 steel wool works great for polishing frets but i would tape off the fretboard in between the frets so just the fret is showing. 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.

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I tried this with a 220 grit sandpaper very lightly but it almost seems as if it's taking the finish off. Wipe off all the compound and take a new rag when you move from rubbing compound to finer polishing compound. For those in need of a more thorough penetration, use a 0000 steel wool.

The polyurethane directions say to lightly sand and apply another coat.

Apply the wax sparingly with a cloth on delicate surfaces. Apply the wax sparingly with a cloth on delicate surfaces. Here are some of our top tips to getting the most from your wax! Tried 3m pad, 0000 steal wool, & 600 grit paper. Some brush marks and bumps raised area. The polyurethane directions say to lightly sand and apply another coat. Steel wool is a bundle of thin metal fibers spun into a pad. You can also use a section of 0000 steel wool to buff the surface.18 x research source.