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<p>[QUOTE=&quot;ValpoBeginner, post: 2650585, member: 77066&quot;]Ok ran it three cycles in the shot glass within the ultrasonic bath. It did remove the verdigris, but had some unintended consequences.&nbsp; Here are the pics of after using sodium hydroxide to dissolve verdigris. </p><p><br /></p><p>[ATTACH=full]586333[/ATTACH] </p><p><br /></p><p>Obverse looks better huh.&nbsp; No damage to the carbon or more importantly the copper. </p><p>[ATTACH=full]586334[/ATTACH] </p><p><br /></p><p>This is where things went too far.. That hole appeared where the verdigris was, and exposed this hole.&nbsp; Also it appears that some AT occurred at the upper left leaves. This I am sure is due to the temperature of the water.&nbsp; Somewhere betwern 120 and 140.</p><p><br /></p><p>I think I&#039;ll just buy the aforementioned&nbsp; Verdi-gone for my large cents and I know I&#039;ll have to be cateful in exposing holes where the copper oxidized.&nbsp; </p><p><br /></p><p>All in all not a bad experiment.&nbsp; I learned that although some things that are supposed to work in theory can use some finesse and genuine expertise.&nbsp; Had fun trying though. Good night.[/QUOTE]</p><p><br /></p>

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