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<p>[QUOTE=&quot;physics-fan3.14, post: 2383031, member: 19165&quot;]The problem is, this coin was already cleaned. It was dipped, and improperly rinsed. What you are seeing is contaminants from the dip (most likely). It has also been polished with a brush, the hairlines you see on the surfaces are from a cleaning. </p><p><br /></p><p>Another dip would strip it even further, and leave it blast white. This coin is not worth sending in to NCS to conserve - they can&#039;t do much for it. It needs a quick dip and long rinse in distilled water to clear the surfaces. Then it needs to be stored in an envelope or album for a few years to restore a patina on the surface. The end result will be an AU details coin that has obviously been cleaned and restored, but it will (probably) be more attractive than the current state. </p><p><br /></p><p>Your other choice, of course, is to sell it and buy a problem free coin.[/QUOTE]</p><p><br /></p>

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