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<p>[QUOTE=&quot;physics-fan3.14, post: 2035818, member: 19165&quot;]The zinc has absolutely no bearing on anything in this discussion. The coins are completely plated in pure copper - no zinc will interact with the acetone (not that it should matter). </p><p><br /></p><p>Acetone is perfectly safe for copper coins. It won&#039;t do anything for toning due to a chemical reaction with the paper (more likely due to the sulfur, not acid). Acetone is only for the removal of organic compounds. </p><p><br /></p><p>So, sure, try it and see for yourself, but if the coins have oxidized or toned, acetone won&#039;t help them.[/QUOTE]</p><p><br /></p>

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