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<p>[QUOTE=&quot;halfcent1793, post: 2916824, member: 86853&quot;]Dip silver coins if you must, but realize the luster will diminish every time you do it, but do NOT dip copper coins. Loss of luster is the least of your problems if you do.</p><p><b><i><br /></i></b></p><p><b><i>NEVER use any acid dip on copper coins. </i></b>It micropits the surface very quickly. The acid in the dip is the major problem. It dissolves native copper as well as toned copper patina. </p><p><br /></p><p>Also, do not use sulfur ointment to &quot;recolor&quot; copper coins. Sulfur also etches (pits) the surface.[/QUOTE]</p><p><br /></p>

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