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<p>[QUOTE=&quot;Insider, post: 2657060, member: 24314&quot;]I bought a group of greek bronzes last week to play with.&nbsp; I put commercial baking soda in a short glass tumbler, added enough distilled water to make a paste, added a green coin, covered it with more of the thick paste solution and let it sit there until the soda had become dry and crusty.&nbsp; When I removed the coin, the area between the layers where the coin had been was green.&nbsp; </p><p><br /></p><p>I regularly conserve US/foreign coins so I plan to use some of the chemicals I have to soak an ancient.&nbsp; The old posting about removing BD was interesting.&nbsp; I&#039;m going to be trying much cruder methods and hope to eventually produce outcomes such as </p><p>ROC.[/QUOTE]</p><p><br /></p>

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