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<p>[QUOTE=&quot;-jeffB, post: 2773984, member: 27832&quot;]It&#039;s not &quot;cleaning&quot; <i>per se </i>that damages a coin, but <i>improper</i> cleaning.</p><p><br /></p><p>If you clean a coin by rubbing it, you&#039;ll likely leave scuffs or scratches. Damage.</p><p><br /></p><p>If you clean a coin by over-dipping it in an acid, you&#039;ll remove some of the surface metal, muting or destroying the coin&#039;s luster. Damage.</p><p><br /></p><p>If you rub with soapy water and fingers, any grit that&#039;s on your fingers or the coin can cause scratches. Damage.</p><p><br /></p><p>If you <i>rinse</i> with soapy water, but the soap contains fragrances or other additives that react chemically with the coin, it can leave the coin with altered color or appearance. Damage.</p><p><br /></p><p>Using the right kind of detergent, and the right kind of agitation, and plenty of rinsing, <i>can</i> clean a coin without damaging it, I guess. But given all the wrong ways to do it, I&#039;m hesitant to suggest that you&#039;ll get it right the first time. If you&#039;re going to try it, practice <i>a lot</i> on coins that don&#039;t matter, and study them <i>very</i> carefully before and after to see exactly what you&#039;ve done.[/QUOTE]</p><p><br /></p>

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