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<p>[QUOTE=&quot;kanga, post: 24700433, member: 9270&quot;]I need to step back a moment and get a basic understanding of how PVC interacts with a coin.</p><p>For this I&#039;m going to limit my thinking to coins with a silver content.</p><p><br /></p><p>1. Is what we call &quot;PVC damage&quot; a chemical reaction between PVC and the coining metal?</p><p><br /></p><p>2. Since most modern US silver coins are 90% silver and 10% copper, are both those metals affected by PVC?</p><p><br /></p><p>3. Does the removal of the &quot;PVC damage&quot; also result in the removal of the coining metal, i.e., pitting of a coin&#039;s surface?</p><p><br /></p><p>4. Anything else that I couldn&#039;t think of?[/QUOTE]</p><p><br /></p>

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