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<p>[QUOTE=&quot;BadThad, post: 654087, member: 17261&quot;]The coin appears to have some deep verdigris. VERDI-GONE™ would help remove a lot of it, but not likely all of it. It would not remove the &quot;black&quot; surface residue unless it&#039;s water soluble.</p><p>&nbsp;</p><p>The first thing to try is distilled water. Soak it for a few days and see what happens. If you don&#039;t get the desired results, you should try xylene. Personally, I wouldn&#039;t even bother with acetone, it would likely be a waste of time. If you have not made conservation progress with water and xylene, then VERDI-GONE™ would be a good thing to try. That verdigris is going to be tough in some areas. I suspect there&#039;s some pitting in the deep spots already, it&#039;s just hiding. You might not like what you find under it all.</p><p>&nbsp;</p><p>If you choose not to attempt conservation, I would recommend a good rinse with acetone and then an Airtite holder. That will keep the verdigris in check for a long, long time.[/QUOTE]</p><p><br /></p>

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