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<p>[QUOTE="gatzdon, post: 293055, member: 8247"]I use the silver cleaner from Walmart ($3), which is really just thiouric acid, on all the proofs I pull out of circulation. </p><p><br /></p><p>On these proofs (and BU coins) for taking off something like a fingerprint, less than a second is all you should use. Rinse with water and do a second dip for 1 second if you must, but if the dirt is still there after that, then you are better off leaving it as it probably has altered the metal underneath already.</p><p><br /></p><p>Most collectors would rather see the dirt on the coin than a corroded spot (myself included).[/QUOTE]</p><p><br /></p>
[QUOTE="gatzdon, post: 293055, member: 8247"]I use the silver cleaner from Walmart ($3), which is really just thiouric acid, on all the proofs I pull out of circulation. On these proofs (and BU coins) for taking off something like a fingerprint, less than a second is all you should use. Rinse with water and do a second dip for 1 second if you must, but if the dirt is still there after that, then you are better off leaving it as it probably has altered the metal underneath already. Most collectors would rather see the dirt on the coin than a corroded spot (myself included).[/QUOTE]
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Has anyone ever used EZ-est
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