Posted 05/28/2012 8:00 pm
An acetone bath surely won't hurt the coin, and should not change the color, if the green stuff is oily then it is probably PVC, if it is hard and crusty it is most likely corrosion that won't come off and has most likely etched into the surface of the coin. Verdi-Care can be helpful in these cases, possibly removing most of the surface contaminants, but once any corrosion has set in it is almost impossible to remove without damaging the surface as well.
"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
