Message:

<p>[QUOTE=&quot;physics-fan3.14, post: 2769204, member: 19165&quot;]The coin is zinc? </p><p><br /></p><p>Don&#039;t even try to touch it. </p><p><br /></p><p>It appears rather attractive now. Zinc is absolutely one of the most difficult coinage metals to work with - nearly everything reacts with it, and nearly every reaction seems to ruin the surfaces or eye appeal. Your coin appears stable and attractive. Leave it that way. </p><p><br /></p><p>Zinc and aluminum..... just don&#039;t even try to do anything with these metals.[/QUOTE]</p><p><br /></p>

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