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<p>[QUOTE=&quot;medoraman, post: 1412016, member: 26302&quot;]I have seen a couple of different types of black &quot;gunk&quot; on coins that was not toning. For some reason nickels, (particularly V nickels), seem to get it. </p><p><br /></p><p>Rest assured, like Doug said, if the acetone removed it the black was not toning or anything else that should have been on the coin. The problem with this is you never know what is under the stuff you are removing. I have seen fairly nice looking coins that once you remove foreign contaminants, (or toning), you have a horrible coin. This is why such coins sell at a discount versus coins where you can inspect the surfaces.</p><p><br /></p><p>Chris[/QUOTE]</p><p><br /></p>

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