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<p>[QUOTE=&quot;mikem2000, post: 2225598, member: 30574&quot;]You can use EZest for copper if you are very careful, but even then, the results are unpredictable.&nbsp; I wish I had documented the process with photography, but about 5 years ago, I took&nbsp; low value Indian Cent that was graded 63 RB.&nbsp; After a very careful dip, it had cleaned the toning up well, and still maintained the luster. In fact it really brought out the luster. The issue though, the coin looked too bright and the color was too orange. So I let the coin sit a few months, and the coin toned to a much more natural look. I sent it in to PCGS and they slapped it in a 64RD holder without issue. That may not always be the results though. On other pieces of copper that&nbsp; I tried, the coins really never retoned to a natural look. I have done many Lincoln &#039;s just for fun and it really varies coin to coin.</p><p><br /></p><p>With a good supply of copper Lincoln&#039;s available you can practice all you want until you get a feel, of what results you can realistically expect. Oh I forgot,&nbsp; I am only talking about UNC coins. I have never seen a circulated copper benefit from an acid bath.[/QUOTE]</p><p><br /></p>

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