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<p>[QUOTE=&quot;desertgem, post: 1362016, member: 15199&quot;]Since the clad layer is 75% copper, 25% nickel like the Jefferson 5 cent CuNi ( except for wartime silver), find a similar crudy jefferson and experiment with e-z-est if you have it, but I have never had any luck with CuNi coins, not even with Nic-a-date. </p><p><br /></p><p>If you don&#039;t want to buy E-Z-est then use any decent acid&nbsp; just to experiment ( * DISCLAIMER * I would never use vinegar on any regular coin, but in this case , just to see if E-Z-Est might help, you could use white vinegar on a cruddy current jefferson that you can then spend. Do not use such on any nice coin such as your original post. (* DISCLAIMER*)</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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