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<p>[QUOTE=&quot;GDJMSP, post: 535258, member: 112&quot;]Toothbrush is a very bad idea. Brushing, rubbing, swabbing, wiping - whatever word you wish to use, touching the surface of a coin with <b>ANYTHING</b> is a bad idea. It <u>will</u> leave marks on the coin.</p><p><br /></p><p>And yes, most chemicals are harmful to coins as well. There are some like acetone and xylene that apparently do not harm the coins. I know from personal experience that acetone can turn copper weird colors sometimes, do not know about xylene. But it will not eat the metal away, that much I do know for certain.</p><p><br /></p><p>It requires knowledge to clean coins without harming them. If you do not have this knowledge - don&#039;t do it ![/QUOTE]</p><p><br /></p>

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