For copper coins sounds like Dellers Darkener - see this link to read about it, olive oil will take it off as will acetone, acetone is the safest stuff for a bath with coins, it will remove all sorts of stuff and not harm the coin. Many unscrupulous dealers will doctor a coin with putty or wax to fill in larger gashes, though I haven't seen this done in many years now.
http://www.wizardcoinsupply.com/del...arkener.html
http://www.wizardcoinsupply.com/del...arkener.html
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector.
See my want page: http://goccf.com/t/140440
ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector.
See my want page: http://goccf.com/t/140440



















