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<p>[QUOTE=&quot;non_cents, post: 1843240, member: 30970&quot;]Nobody (as far as I know) &quot;cleans&quot; coins when they are graded. Maybe you are referring to the NGC conservation service, which is different. The conservation service does its best to remove aspects of the coin which were NOT PRESENT when it was struck, such as verdigris or other environmental damage. Again, this is not altering the ORIGINAL state of the coin, because it is removing something that developed after it was struck in an effort to conserve the coin.[/QUOTE]</p><p><br /></p>

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