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<p>[QUOTE=&quot;desertgem, post: 679630, member: 15199&quot;]Actually the sheen was there on the 16-S before the DMSO treatment, just that the DMSO didn&#039;t remove it. Doug&#039;s remark about it taking a while to be sure reminds me I had better get the &quot;Verdigone experiment&quot; coins out and rephotograph&nbsp; to show how they have come along.&nbsp; I really don&#039;t expect anything dire to come from the DMSO, the chemical makeup would indicate non-reactivity with metals, and the use of high grade DMSO removes much of the possiblilty, as well as using their solubility in alcohol, and acetone removal of the alcohol and drying action. But, assumptions in science are bad, so the coins I practiced on, will go into storage and be re-examined in the future.</p><p><br /></p><p>Photos can&#039;t tell the whole story. I had these coins in hand before and after the DMSO, and they aren&#039;t my coins, but I could tell a big difference in the surfaces, with them looking more normal after the removal of the coating. Before in my searches for Spock on his lacquered/shellac coins, I couldn&#039;t find any mention of removal of the more modern acrylic mixes. Many solvents can dilute them before application, but once they harden, no mention other than physical abuse could remove it.</p><p><br /></p><p>Also, I was looking for lacquered coins on ebay to try on my own before Boss so kindly let me work on his.&nbsp; </p><p><br /></p><p>Tom has always been asking for Open and implicit information on chemical interaction, so I hope this encourages scientific discussion. Hopefully, although I am certain not all, anyone wanting to do this should read the whole procedures carefully&nbsp; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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