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<p>[QUOTE=&quot;desertgem, post: 3832163, member: 15199&quot;]Try the polishing compound on the bathroom mirror and see if it scratches. The hardness of glass is about 100 times that of gold, silver or copper. You may not see the scratches, but if it polishes ( removes surface) automotive metal it will do damage to coin metal.&nbsp; </p><p><br /></p><p>When I first started in the last century, an old pro told me to use Ajax cleanser, and my very first morgan was damaged. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" />&nbsp;&nbsp; Old numismatic &#039;magic&#039;&nbsp; formulas still pop up.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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