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<p>[QUOTE="lordmarcovan, post: 3276231, member: 10461"]I think it's probably old glue. [USER=33176]@Kentucky[/USER]'s advice seems sound to me. Unfortunately, even if you successfully remove the gunk without altering the existing toning on the coin, you still run the risk of having the "protected" areas that were beneath the deposits being brighter than the rest of the coin afterward. But it's worth that risk to get the stuff off, I think. If there are brighter patches afterwards, then we can discuss the possibility of retoning with a Vaseline and sulfur paste- something like Deller's Darkener.[/QUOTE]</p><p><br /></p>
[QUOTE="lordmarcovan, post: 3276231, member: 10461"]I think it's probably old glue. [USER=33176]@Kentucky[/USER]'s advice seems sound to me. Unfortunately, even if you successfully remove the gunk without altering the existing toning on the coin, you still run the risk of having the "protected" areas that were beneath the deposits being brighter than the rest of the coin afterward. But it's worth that risk to get the stuff off, I think. If there are brighter patches afterwards, then we can discuss the possibility of retoning with a Vaseline and sulfur paste- something like Deller's Darkener.[/QUOTE]
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