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<p>[QUOTE=&quot;Spark1951, post: 5178490, member: 90692&quot;]It’s the <i><b>soaking </b></i>you have to be wary of.&nbsp; I soaked some brass German 10 pfennig for over 48 hours that came out clean but blotchy with pink sections.&nbsp; I believe it is the impurities released during soaking that does this.</p><p><br /></p><p>&nbsp;I was using virgin 100% acetone.&nbsp; Now, they look “improperly cleaned”.&nbsp; This was not a test, this was a goof on my part...Spark[/QUOTE]</p><p><br /></p>

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