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<p>[QUOTE=&quot;GDJMSP, post: 717123, member: 112&quot;]Big no-no ! Using anything like that is harmful to the coin. In fact just wiping the coin with a cloth, or even your finger, is harmful to the coin.</p><p><br /></p><p>What is on your coin is toning, that&#039;s all. And before those black spots you mentioned were black - they were brown at some point. Toning has many stages. It gradually progresses over time and changes color. It can virtually be any color you can imagine.</p><p><br /></p><p>Now if you want to remove it, a commercial coin dip will do the trick. But coins dips are acid and they will remove a thin layer of metal from the coin. That&#039;s why they remove toning. The color is IN the metal, not ON it. So it cannot be removed without removing metal.[/QUOTE]</p><p><br /></p>

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