tag:blogger.com,1999:blog-2796913573142573350.post7282255131867203856..comments2023-10-30T10:11:10.522-05:00Comments on Ancient Coin Cleaning And Restoration: Zap Coins And Save The PatinaUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2796913573142573350.post-59666713324243956702007-09-01T03:57:00.000-05:002007-09-01T03:57:00.000-05:00Thanks to your suggestion, I used most successfull...Thanks to your suggestion, I used most successfully a graphic pencil (4H)to erase some black marks on a silver tetradrachm: all other attempts failed.This shrp pencil auses no harm to the surface of the coin.Unknownhttps://www.blogger.com/profile/05896746629607704241noreply@blogger.com