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<p>[QUOTE=&quot;Howard Black, post: 3333576, member: 97119&quot;]Also, when using Acetone <b><i>don&#039;t </i></b>use nailpolish remover or any of the majority of &quot;pure&quot; Acetone which, when you read the label, you will discover has various additives (frequently if not always unnamed, IIRC), which are used as skin softeners and so forth.</p><p><br /></p><p>It took a lot of searching but I finally did find some &quot;Industrial Grade&quot; Acetone on Amazon. Was more expensive than the consumer grade but worth the cost considering the purpose.</p><p><br /></p><p>And the difference is more than imaginary. I did a test -- one against the other. The actually pure (with CAS number on the label) evaporated from the surface of the coin much more rapidly, and the fingernail grade left a greasy deposit on the surface, with a bit of &quot;rainbow&quot; reflection.</p><p><br /></p><p>So, I only use truly pure Acetone, and same with Xylene. Other than that, the only other stuff I will are soapy water -- and, the final contestant, &quot;VERDI-CARE,&quot; used for &quot;lost cause&quot; cases.[/QUOTE]</p><p><br /></p>

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