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<p>[QUOTE=&quot;Publius2, post: 26069052, member: 105571&quot;]I use acetone to remove organic contaminants from silver and nickel coinage, but not copper.&nbsp; While I can&#039;t attest to it from personal experience, I have read here that acetone can discolor copper coinage.&nbsp; While our silver and nickel coinage is alloyed with copper, I have not seen any discoloration when using acetone.</p><p><br /></p><p>I have used xylene after trying acetone unsuccessfully.&nbsp; There are contaminants that acetone will not touch.</p><p><br /></p><p>As for xylene in quarts, I get it locally (central Florida) from Home Depot.[/QUOTE]</p><p><br /></p>

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