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<p>[QUOTE=&quot;dollar, post: 702028, member: 19882&quot;]I&#039;m not sure if this is a post mint error or not. I did run the penny under water with a mild detergent (probably the first wrong thing). The marks did not come off after this. Should I put the coin in acetone? The reason I haven&#039;t done that yet is that it doesn&#039;t look like something ON the surface. Any suggestions on how to clean this? Thanks...[/QUOTE]</p><p><br /></p>

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