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<p>[QUOTE=&quot;saltysam-1, post: 2290849, member: 23368&quot;]Because cleaning will remove the original patina on the coin. That&#039;s what cleaning is about, removing all surface build up. It cannot distinguish between the good surface affects and the bad surface affects. So yes, it will lessen value regardless of appearance. Not to mention that it has probably removed some of the surface metal to accomplish this. That&#039;s why repeated dipping causes a grayish look and sometimes even porous surfaces.[/QUOTE]</p><p><br /></p>

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