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<p>[QUOTE=&quot;medoraman, post: 1127103, member: 26302&quot;]Well Siggi I would lower that to 90% silver, as I have dipped many US coins.</p><p><br /></p><p>&quot;Cleaning&quot; is such a large term many things can get lost. Are you referring to ancients or modern coins? BU or circulated? Using water or chemicals? &quot;Never clean a coin&quot; was made to keep amatuers from destroying coins, which they have by the millions over the years. I would say, however, that cleaning a coin in distilled water and thoroughly drying has never harmed 99%+ of coins.</p><p><br /></p><p>If someone here posts about cleaning, we should ask more details of WHAT they are wishing to clean, WHY they think they need to, and HOW they were going to do it. What will &quot;clean&quot; an ancient will destroy the value of a modern BU, but what you would use on modern BU or circulated coins will have zero effect on ancients.</p><p><br /></p><p>To Josh the OP, any chemical I can think of either will or will likely remove toning. Toning is the first outside layer of metal, so it will be the first affected. About the only thing you can do that will not harm toning is to use distilled water, keep it cool, and quickly and thoroughly dry the coin.[/QUOTE]</p><p><br /></p>

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