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<p>[QUOTE=&quot;Jack Winger, post: 38648, member: 2139&quot;]I&#039;m not a chemist either but I am an electronics engineer.</p><p><br /></p><p>We use that stuff at work in electronics manufacturing.&nbsp; I don&#039;t think I would want to use it on coins.&nbsp; Although it is not supposed to leave any &quot;electronic&quot; residue, I don&#039;t know what it might do to a gem proof quarter.</p><p><br /></p><p>Of course, you could try it on one or two &quot;expendable&quot; test coins, but it may take you a few years to find out its effects.[/QUOTE]</p><p><br /></p>

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