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<p>[QUOTE=&quot;Stujoe, post: 3222, member: 11&quot;]They may grade lower because of their &#039;eye appeal&#039; or lack of &#039;eye appeal&#039;. </p><p><br /></p><p>If it is really dirt or grime, you could give them a rinse in (pure) acetone and it will take some things off as it is a solvent. It should not damage the actual coins in any way. However, depending upon what is underneath the dirt or grime, the coins may or may not look better afterwards. There is always a risk when you do anything to a coin. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /> Acetone will not take off toning.</p><p><br /></p><p>There is a company that does &#039;conserve&#039; coins and they are affiliated with NGC (one of the top tier grading services).</p><p><br /></p><p>The webiste for them is </p><p><br /></p><p><a href="http://www.ncscoin.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.ncscoin.com/" rel="nofollow">http://www.ncscoin.com/</a></p><p><br /></p><p>Hope that helps.[/QUOTE]</p><p><br /></p>

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