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<p>[QUOTE=&quot;Daenegger, post: 2133354, member: 74299&quot;]I&#039;m honestly new to the field of collecting/dealing.&nbsp; It doesn&#039;t mean I haven&#039;t done my homework or worked on coins and am constantly refining my techniques to the needs of the market.&nbsp; </p><p><br /></p><p>NGCS does make a distinction between improprer cleaning, PCGS uses the term harsh I believe, and just cleaned.&nbsp; They are different codes as our friend the moderator has so helpfully pointed out.&nbsp; </p><p><br /></p><p>(I apologize for ruffling your feathers btw.&nbsp; I didn&#039;t intend to be as impolite as I was on a second reading.&nbsp; If you&#039;d like to know what I&#039;m talking about with the micro-abrasion I&#039;d be happy to tell you and only you if there is a way to privately message. )</p><p><br /></p><p>If I&#039;m trolling you it&#039;s for informed opinions and I&#039;m listening to what everyone has to say.&nbsp; </p><p><br /></p><p>Cleaned, restored, conserved whatever you want to call it to me means taking a coin I get raw and restoring it as much as I possibly can to the condition the coin was when it was produced, ideally without destroying any lusters along the way. In archaeology you restore artifacts as closely as possible to their original condition and then you preserve them to keep them from degrading again/further.</p><p><br /></p><p>As to Acetone it has a very low vapor point that&#039;s why it&#039;s cold if you spill it on yourself.&nbsp; It does leave a residue.&nbsp; I watch the heat knock it off ~50% of the coins I restore and it is generally a harsher chemical than acetic acid is.&nbsp; It will take off any PVA based plastics residues (Sharpy marks, Flip surfaces, etc.).&nbsp; If you&#039;ve ever tried to take it to a simmer you&#039;ll see my issue with it&#039;s vapor point.&nbsp; It doesn&#039;t last long enough to transfer any heat to the coin.&nbsp; </p><p><br /></p><p>Heat forces to coin to physically expand slightly and loosens up gunk.[/QUOTE]</p><p><br /></p>

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