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<p>[QUOTE=&quot;medoraman, post: 2204058, member: 26302&quot;]The only danger I could see would not be from the acetone, but what happens after the acetone removes the organic compounds. Lets talk about a red cent. Maybe there is an organic layer on an otherwise red cent. Lets place in acetone and remove this layer. Now, once the coin comes OUT of the acetone, the surfaces now have a chance to react to the environment more freely. That would be the only danger I could see, that by cleaning the surfaces you are now allowing the metal to once again try to tone.</p><p>&nbsp;</p><p>Also, I agree with Doug on copper. Copper is always troubling since it has the most complex color variations. removing a layer of something from its surface can do quite a few different things to the perceived color. I do not think the acetone changed the toning, but the perceived color can be changed by removing some non-toning from the surface.[/QUOTE]</p><p><br /></p>

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