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<p>[QUOTE=&quot;Maxfli, post: 2829622, member: 69089&quot;]By far I find acetone most valuable in removing the organic gunk that can accumulate in the devices of circulated coins over years/decades of physical handling and exposure to organic compounds in the air (like nicotine, for example).</p><p><br /></p><p>Even when I buy a raw coin* that&#039;s in UNC condition, it gets an acetone bath because I don&#039;t know how it was stored and what still-invisible trace organic compounds might have collected on its surface.</p><p><br /></p><p>*Silver and CN coins only. I&#039;ve experienced a few discoloration issues with acetone on bronze coins, so for those I limit myself to water followed by xylene.[/QUOTE]</p><p><br /></p>

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