I understand that if they get it 'early' enough, before the print begins to eat into the surface, they can remove it. Once the print has been on long enough (and I don't know how long it takes) to eat into the surfaces...they may be able to improve the appearance...but will not be able to remove it.
I was watching the special on Discovery channel once about shipwreck coins. There was a NCS segment in it, where they were showing how they were removing the build up on the gold coins. NCS guy was explaining how the process works and said that cleanind ss Republic coins is easier than removing a fingerprint.
<< <i>Does anybody know how long a print has to be on a coin before it begins to leave permanent marks? >>
I'd think it would depend on the acidic quality of the oil of the fingerprint. In other words, it depends on many factors and there isn't any hard and simple answer.
I hope this adds to the confusion.
"Lenin is certainly right. There is no subtler or more severe means of overturning the existing basis of society(destroy capitalism) than to debauch the currency. The process engages all the hidden forces of economic law on the side of destruction, and it does it in a manner which not one man in a million is able to diagnose." John Marnard Keynes, The Economic Consequences of the Peace, 1920, page 235ff
Comments
Greg Hansen, Melbourne, FL Click here for any current EBAY auctions Multiple "Circle of Trust" transactions over 14 years on forum
Russ, NCNE
Richard.
<< <i>Does anybody know how long a print has to be on a coin before it begins to leave permanent marks?
I'd think it would depend on the acidic quality of the oil of the fingerprint. In other words, it depends on many factors and there isn't any hard and simple answer.
I hope this adds to the confusion.
John Marnard Keynes, The Economic Consequences of the Peace, 1920, page 235ff
once metal is etched, as can be caused by f-prints, fuhgeddaboutit.
K S