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<p>[QUOTE=&quot;Maxfli, post: 3630485, member: 69089&quot;]Agreed. In my experience of using acetone over several decades, coins usually come out of the wash looking more vibrant than before, particularly with mint state uncirculated coins.</p><p><br /></p><p>The reason is elementary, really. Any presence of organic contaminants, even minute amounts invisible to the naked eye, can have a dulling effect. Acetone floats those contaminants away, revealing the true appearance of the coin.</p><p><br /></p><p>If the coin comes out unchanged, I take that as a likely indication that the coin was properly stored and protected by the previous owner.</p><p><br /></p><p>Acetone won&#039;t do much for the appearance of a dull circulated coin, but since such coins sometimes come with organic debris accumulated in the devices, an acetone soak is still a smart conservation step.[/QUOTE]</p><p><br /></p>

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