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<p>[QUOTE=&quot;Check_M_All, post: 170066, member: 6661&quot;]I don&#039;t know. That&#039;s why I was asking. I don&#039;t want to &quot;brighten&quot; or alter coins at all, I&#039;m just wondering if there is a safe way to lift the dirt residue without changing the underlying surface of the coin. I don&#039;t know if this falls under the category of &quot;cleaning&quot; or not. The finger oils and dirt that accumulate over the years and leave the surface of the coin feeling greasy is akin to glue residue to me. If this falls under the broader category of cleaning, including dipping, wiping, polishing... then I&#039;ll leave the issue alone and simply enjoy my greasy, dirty coins as they are. </p><p><br /></p><p>Acetone seems generally accepted for dissolving crud off of coins without altering them, so I thought perhaps it could be used for this purpose as well. However, if it will leave a residue then it defeats the purpose.[/QUOTE]</p><p><br /></p>

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