Originally Posted by
MistWolf
Your second mistake was using nail polish. Nail polish is removed with nail polish remover. Nail polish remover is nothing more than diluted acetone with perfume added.
If, after removing the nail polish, you still want fill the fill marks on your firearm, do it right and use Lacquer Stiks. It's what professionals use to fill stampings on machines parts, engravings on bowling balls and so on. They're much easier to use and faster than nail polish, model paints and other silliness that's usually suggested by amateurs.
Lacquer Stiks are sold by Brownell's and online bowling supplies.