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<p>[QUOTE=&quot;ldhair, post: 3251579, member: 11540&quot;]I&#039;m a fan of using acetone on copper. It can remove impurities that are masking the true color below it. I have seen a few change color after an acetone bath.</p><p>&nbsp;</p><p>Folks have been treating coins with all kinds of stuff for many years. Just think of all the ways people try to darken copper. Some don&#039;t tone the copper they just lay on the surface of the coin.[/QUOTE]</p><p><br /></p>

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