I have a trumpet that has a small spot where the lacquer has come off and the brass looks much duller than the surrounding area. The size of this area is about 1/4 inch across and a little less in height. I'm considering polishing this area and then covering it with clear nail polish. Would this be an effective solution? Are there better ways to improve the cosmetics than this? I'm a little worried that polishing the brass might abrade the lacquer next to the spot.