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<p>[QUOTE=&quot;Mr.MonkeySwag96, post: 8521728, member: 100951&quot;]All ancient coins were mechanically cleaned. The dirt is gently removed using bamboo picks and distilled water. The problem is that some ancient coins are “overcleaned.”</p><p><br /></p><p>Overcleaning is less of a problem for ancient silver coins. Ancient silver coins can always retone over time when stored in a cabinet.</p><p><br /></p><p>However, an ancient bronze coin that’s been “stripped” of its patina is ruined. I believe a patina is thicker than typical toning. The patina protects ancient bronze coins from corrosion such as “bronze disease.” When you strip an ancient bronze coin of its patina, it can’t get it back. </p><p><br /></p><p>Correct me if I’m wrong[/QUOTE]</p><p><br /></p>

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