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<p>[QUOTE=&quot;desertgem, post: 698115, member: 15199&quot;]Thad, I was mainly trying to evaluate its use for copper coins, and I have found that it is good to clear BU coins that are getting a little hazy. But the effects on RB,BN, or even UNC coins that have developed a&nbsp; good patina, is unpredictable and tends to act lip an acid dip, leaving unnatural coloration. As to removing bronze disease, verdigris, it is not as effective as your formula. I was hoping it would be effective on the &quot;milk spots&quot; on the 2009 cents, but it wasn&#039;t, or I would have posted it&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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