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<p>[QUOTE=&quot;GSDykes, post: 4023597, member: 73321&quot;]From &quot;topcoins.com&quot; comes this information:</p><p><br /></p><p>&quot;On cleaning coins with verdigris: you first need to have your coin clean of any wax or oil product particularly preservatives. The verdigris is a chemical reaction occurring between the moisture in air and the coins surface. This chemical reaction eats into and destroys the coins surface.</p><p><br /></p><p>I have had great success in removing verdigris from some of my prize specimens using Benzotriazole 5% in Ethanol. (Which is flammable and only to be used out side in open air with eye protection). It took longer then I had expected but I am pleased with the results and I have not damaged the patinas.</p><p><br /></p><p>I have read that some patinas have been harmed using this product but so far that is not my experience. When your coin is clean of verdigris, anywhere from a week to some months depending on the depth of the reaction, the coin must be soaked in distilled water for at least a week but a month would be better.</p><p><br /></p><p>Your coin is then dried in air and then in an oven, to drive out any entrapped moisture. The oven should only be moderate heat about 200 F or 140 C. Leave it to dry in the moderate oven at least 10 to 15 min. remove and cool to room temperature slowly. Apply Ren wax or Lanolin oil to the surface to seal it from the elements.&quot;</p><p><br /></p><p>end brief quote,</p><p><br /></p><p>interesting, I wonder where one can purchase this stuff??</p><p>Gary in Washington[/QUOTE]</p><p><br /></p>

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