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<p>[QUOTE=&quot;hotwheelsearl, post: 8314420, member: 75143&quot;]I think one of the reasons that I tend to <i>prefer</i> chemicals over electrolysis, is that it <i>tends</i> to preserve most of the original surface, and often the patina. </p><p>Electrolysis can often strip coins down to the bare metal, while something like sodium hydroxide or sodium thiosulfate will often leave most of the precious patina intact. It will sometimes dull the surface, but an application of Ren Wax will give it back.</p><p>Short of mechanical cleaning, though, there&#039;s almost no way to really guarantee that the coin is going to come out good.[/QUOTE]</p><p><br /></p>

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