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<p>[QUOTE=&quot;Colonialjohn, post: 5273374, member: 57741&quot;]See my post under the Main Forum under Coin Community Forum on the outcome of this piece. CUrrently experimenting with water and hydrogen peroxide on its effects on copper. Shows promise on removing green verdigris but leaves black areas of its presence however no real effect on mint state fields or cartwheel effects so IMO more (+&#039;s) then minuses. JPL[/QUOTE]</p><p><br /></p>

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