I HAVE USED DENATURED ALCOHOL WITH A STURDY RAG.....IF THAT DOESN'T DO IT...ACETONE WILL...IF YOU DO NOT HAVE ANY...A FORAGING TRIP THROUGH TE MEDICINE CABINIT WILL USUALLY FIND THE WIFE'S [OR GIRL FRIENDS SUPPLY OF FINGER NAIL POLISH REMOVER WHICH CONTAINS ACETONE..... BLACKJACK