i recently got an older Taurus PT-22 metal frame pistol. nothing special but the coating on the frame ( looks like paint rather than parkerized because it comes off easy) doesn't look so great. id like to re do it but it looks as if the serial number is maybe painted on as well? anyone have an ideas or been through this situation before? i don't want to cover it up of course but would like to make it look nice/protect it.