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<p>[QUOTE=&quot;-jeffB, post: 4100916, member: 27832&quot;]Cleaning coins <i>improperly</i> damages them. Soaking them (<b>no rubbing</b>) in acetone isn&#039;t improper, and won&#039;t damage them. (Some here believe it can change the color of copper coins; if you&#039;re concerned about that, another solvent, <b>xylene</b>, should also work, and everyone agrees that&#039;s safe for any metal.)</p><p><br /></p><p>After you do soak them, be sure to put them into <i>new</i> 2x2s, and throw the old ones away. The old ones will now have the sticky stuff on their inner surfaces, and if you reuse them, you&#039;ll just put the dangerous stuff back onto your coins.</p><p><br /></p><p>Good luck![/QUOTE]</p><p><br /></p>

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