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<p>[QUOTE=&quot;Michael K, post: 5005347, member: 78298&quot;]I don&#039;t think the hydrogen peroxide is a good idea. It can make coins appear unnaturally white. I wouldn&#039;t want to convert a 1921 which is one of the key dates in the set to melt value because of a botched cleaning attempt.</p><p>IDK but I assume if it&nbsp; is diluted and just used very briefly, it could help,</p><p>but you would already have to have experience with this method and not be using this coin as the practice piece.</p><p>As for acetone fumes, I use a glass jar with a lid, the fumes are minimal.[/QUOTE]</p><p><br /></p>

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