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<p>[QUOTE=&quot;daveydempsey, post: 3019260, member: 22&quot;]Verdigris attacks copper which will be alloyed with the silver.</p><p><br /></p><p>I use virgin olive oil on copper alloy and pure copper coins to get rid of verdigris.</p><p><br /></p><p>Another possibility is Bronze Disease which is an irreversible form of corrosion.</p><p><br /></p><p>I would not use vinegar as it is an acid.[/QUOTE]</p><p><br /></p>

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