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<p>[QUOTE=&quot;Charles Brooks, post: 3963689, member: 94453&quot;]Everybody keeps saying &quot;heat&quot; That is kinda ridiculous Because zinc melts BEFORE copper (Zinc-419.5 degrees Copper-1084 degrees)! I am a life-long (44yrs) exotic metals fabricator and believe I know what I am talking about here. I have stripped the copper from zinc pennies many times and it has been done with almost any type of weak acid. I have used lemon juice, vinegar, CLR, and diluted sulfuric (battery acid) and they always come out looking EXACTLY like this coin.[/QUOTE]</p><p><br /></p>

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