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<p>[QUOTE=&quot;BadThad, post: 680441, member: 17261&quot;]You have severe verdigris. VERDI-GONE™ will not conserve coins this far gone. The only options for verdigris this far advanced are:</p><p>&nbsp;</p><p>1) Mineral acid - A mineral acid such as hydrochloric or sulfuric would remove most of the verdigris. However, since so much copper has been removed from the surface by the verdigris the coins will lose a lot of detail. Verdigris at this stage will contour itself to the coin design. When you remove it, you&#039;ll remove detail. Also, the coin will absolutely look cleaned.</p><p>&nbsp;</p><p>2) Recommened! Soak the coin in distilled water for a few days to solubilize the verdigris acids. The water should be changed a few times. Put the coin in acetone for a few hours to dry it. Immediate put the coin into an AirTite or Intercept Shield holder.</p><p>&nbsp;</p><p>If you protect the coin from air and water, the verdigris will essentially halt where it is.[/QUOTE]</p><p><br /></p>

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