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<p>[QUOTE=&quot;desertgem, post: 3297476, member: 15199&quot;]Approved or not, if the coin is<b> circulated</b>, I submerge it is a glass petri plate or shallow glassware with a covering of acetone. Then I let it soak for 15-20 minutes , you can cover the top, and then use the brush to gently swirl the acetone over the coin and remove the surface gunk. it can be repeated if the gunk is heavy, but try to limit the brush to the areas you need to see,&nbsp; I would not use this on a MS or Proof. Such coins have been through the larger TPG s with no rejection. JIM[/QUOTE]</p><p><br /></p>

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