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<p>[QUOTE=&quot;luke2012, post: 1467435, member: 35927&quot;]Anyone here have any guesses on what methods PCGS uses to &quot;conserve&quot; coins? I would think it would not be that hard for a person that is knowledgeable in chemistry to figure out what the best methods are? Also i would think that archaeologists would use slimier method&#039;s to clean artifacts and might not be as secretive about them.[/QUOTE]</p><p><br /></p>

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