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<p>[QUOTE=&quot;Carlos Arriaga, post: 2034163, member: 16089&quot;]The appearance after use of an acid, is like your penny. The image Quality is loosed. After work any way I&#039;ll visit a friend wish is specialist in chemistry.</p><p>This morning I asked to two mechanicals Engineers about corrosion. And they said IT&#039;S NOT CORROSION IN THERE.</p><p>WHAT I THINK IS THAT. The Anealing, washing and drying process was for planchets thicker and bigger in Diameter than this one. That&#039;s why; the material was too weak when passed by the Pre-striking area. &quot;may be&quot;.[/QUOTE]</p><p><br /></p>

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