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<p>[QUOTE=&quot;Neal, post: 4699089, member: 43872&quot;]Good luck with this.&nbsp; I would be very interested to know what works.&nbsp; I suspect nothing chemical will work satisfactorily because the problem is not just oxidation.&nbsp; Zinc crystallizes and even crumbles, especially as it changes temperatures.&nbsp; This is part of the problem with the zinc Lincoln cents and why I don&#039;t buy any of them.[/QUOTE]</p><p><br /></p>

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