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<p>[QUOTE=&quot;Kentucky, post: 2658366, member: 33176&quot;]Mostly agree that the porosity was covered by the crud (unwanted patina).&nbsp; Don&#039;t think much if any metal was removed since the solution didn&#039;t develop much color and compounds of copper are colored.&nbsp; I have noticed that cleaning with chemical solutions often leaves a grainy surface.&nbsp; Gonna&#039; try one more pair of pics on a white background to see if I can capture the true appearance.[/QUOTE]</p><p><br /></p>

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