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<p>[QUOTE="Michael K, post: 3528222, member: 78298"]What Seattlite said. Ideally acetone works well on silver coins by removing crud</p><p>without any chemicals/ acid/ or wiping.</p><p>Some people say not to use them on copper coins, and some say its fine.</p><p>The acetone will not "clean" a coin. And it won't do anything for that 1st coin.</p><p>But the second coin, that green crud could dissolve (and then lightly rinse with distilled water) but in this case that's not a rare, old, or valuable coin, so tap water is fine.</p><p>The acetone works because it does not scrape off a thin layer of metal from the coin.</p><p>When people clean coins harshly, with solvents and polishing, the coins can get "shiny" but that is because a thin layer of metal has been removed and the coin is now permanently damaged. Acetone leaves that layer of metal intact. Sometimes</p><p>the coin will be "cleaner" and sometimes it won't. Depending what's on the coin.[/QUOTE]</p><p><br /></p>
[QUOTE="Michael K, post: 3528222, member: 78298"]What Seattlite said. Ideally acetone works well on silver coins by removing crud without any chemicals/ acid/ or wiping. Some people say not to use them on copper coins, and some say its fine. The acetone will not "clean" a coin. And it won't do anything for that 1st coin. But the second coin, that green crud could dissolve (and then lightly rinse with distilled water) but in this case that's not a rare, old, or valuable coin, so tap water is fine. The acetone works because it does not scrape off a thin layer of metal from the coin. When people clean coins harshly, with solvents and polishing, the coins can get "shiny" but that is because a thin layer of metal has been removed and the coin is now permanently damaged. Acetone leaves that layer of metal intact. Sometimes the coin will be "cleaner" and sometimes it won't. Depending what's on the coin.[/QUOTE]
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