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<p>[QUOTE=&quot;wlwhittier, post: 840189, member: 18320&quot;]Hi...</p><p><br /></p><p>I bought maybe a pound of US silver coin (quarters &amp; dimes) that had been in a house fire...it&#039;s bullion only.&nbsp; But it&#039;s badly (some much worse that the rest) blackened with a crust of something that resembles a really cooked plastic...very difficult to pick, scrape or chip off.&nbsp; </p><p><br /></p><p>I know about cleaning numismatic-value coins (don&#039;t) but have any of you done any tumbling of this type?&nbsp; I&#039;ve tried all the common solvents, and nothing seems to begin to change (remove) this charred stuff.&nbsp; I want &#039;em clean.</p><p><br /></p><p>Your suggestions are welcome...[/QUOTE]</p><p><br /></p>

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