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<p>[QUOTE=&quot;Emoticon, post: 1493399, member: 38428&quot;]I was dipping some coins in acetone to remove some black sludge on an off center misaligned die penny I found. I have a little knowledge about chemistry and I was wondering... in the lab in addition to using acetone to clean glassware if something still wouldn&#039;t come off still we would use other &quot;stronger&quot; organic solvents like hexane or chloroform. I am thinking that a chloroform dip would do a much better job at restoring a coin than acetone without attacking the metal or most oxides that form toning like a strong acid would... has anyone tried this? Also has anyone tried<b> lightly</b> heating the acetone? <u><b>PSA:</b></u> <b>Don&#039;t even think about trying to heat acetone unless you know exactly what you&#039;re doing,</b> acetone starts to vaporize just above freezing (that&#039;s why it makes your fingers feel so cold it almost feels like burning as it evaporates so fast) making it very easy to ignite if heated too much or with the wrong equipment.[/QUOTE]</p><p><br /></p>

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