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<p>[QUOTE=&quot;Numismat, post: 1283765, member: 15019&quot;]Unless the coin is lustrous and mint state, there will always be something else on the surface. Acetone will react with organic compounds in patina, especially the type that forms on copper coins, and I&#039;ve noticed it giving an unnatural shine like chemical cleaning to some aluminum-bronze coins. I apologize if you read my post as implying that acetone reacts with the metal itself, which was not my intention.[/QUOTE]</p><p><br /></p>

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