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<p>[QUOTE=&quot;desertgem, post: 1629377, member: 15199&quot;]The PCGS EDX machine might be able to sniff acetone if it was on the coin, but there should be no acetone there at all, if pure acetone was used and if the coin was dry. Perhaps they tested it by dipping it in acetone and then sniffing it.</p><p><br /></p><p>GSR ( gunshot residue testing) is often done by EDX, and guess the solvent commonly used to dissolve possible residue before testing ~ acetone..because it evaporates completely in a normal environment. To me it seems like a &quot;scare tactic&quot; to keep people from treating their coins before submitting. </p><p><br /></p><p>I wonder if they prohibit Diabetics from grading coins at PCGS as Diabetics can produce enough acetone in their breath for even the poor human smell to detect as a &quot;fruity&quot; smell. Sorry I don&#039;t buy their comment.IMO.[/QUOTE]</p><p><br /></p>

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