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<p>[QUOTE=&quot;Cloudsweeper99, post: 114106, member: 3011&quot;]I tried the WD-40 method on a circulated morgan dollar that was encrusted with something that adhered to the surface.&nbsp; I soaked it for about 3 days.&nbsp; It removed whatever it was on the surface and the coin really looked a lot better and even retained original toning common to morgans that WD-40 apparently doesn&#039;t harm. Unfortunately, it also revealed a badly damaged spot on the obverse, but that was there before the soaking.&nbsp; Depending on how bad the coin is to start with, this doesn&#039;t seem to be a bad treatment when the coin isn&#039;t worth the cost of professional conservation.[/QUOTE]</p><p><br /></p>

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