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<p>[QUOTE=&quot;desertgem, post: 2160502, member: 15199&quot;]No, coin care should not remove any metal, it just puts oil on the surface ( fake luster)&nbsp; as it dissolves gunk. Getting the gunk off the coin without rubbing is often the problem. It can be detected by a &#039;sniffer&#039;</p><p><br /></p><p>Ez-Est ( formerly Jeweluster) is sulfuric acid /thiourea solution . The acid removes the sulfides ( tarnish) and the thiourea, makes a soluble solution to wash them away. I have always recommended that low concentrations are used to prevent over reaction that removes the &#039;ridges&#039; of the coin metal that makes the &#039;wagonwheel&#039; luster effect. I dilute it to 1/10 strength for single use ( keep the rest in container at full strength until need to use), rinse well with water and then with acetone and hold in air by edge until dry ( it does so quickly) , put in protective holder.</p><p><br /></p><p>MSDS:</p><p><br /></p><p><a href="http://www.wizardcoinsupply.com/files/images/E-Z-Est-MSDS.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.wizardcoinsupply.com/files/images/E-Z-Est-MSDS.pdf" rel="nofollow">http://www.wizardcoinsupply.com/files/images/E-Z-Est-MSDS.pdf</a>[/QUOTE]</p><p><br /></p>

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