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<p>[QUOTE=&quot;7Jags, post: 25274059, member: 78719&quot;]I have several posts on getting rid of copper oxidized red spots on gold coins, take a look if interested.</p><p>Here is a 1980 Panama 100 Balboas unc that I won at auction and was in an ANACS MS66 soapbox holder. The surface looked like some scum and superficial marks:</p><p>[ATTACH=full]1613036[/ATTACH] [ATTACH=full]1613037[/ATTACH] </p><p><br /></p><p>I cracked it out and then tried acetone which did next to nothing. I then went with my favorite go-to&nbsp; -&nbsp; &nbsp; this was to rinse, tamp dry with high nap white cotton towel, wash between my fingers (!) with water and dish detergent, then rinse well, tamp dry, put coin in dye free ammonia for about 5 minutes (I will occ. use for shorter or longer periods), then soak Q-tip in same ammonia and then tamp the surface WITHOUT scrubbing or brushing surface to thus avoid hairlines, then rinse again and tamp dry with same towel (but not same part of towel). I sent it in to PCGS and got this:</p><p><img src="https://d1htnxwo4o0jhw.cloudfront.net/pcgs/cert/45217263/246355341.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Which graded 69PL.[/QUOTE]</p><p><br /></p>

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