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<p>[QUOTE=&quot;desertgem, post: 3237529, member: 15199&quot;]I suspect neither one will do the job you are hoping for. If you don&#039;t have the chemicals mentioned above already , the cost of attempting might be higher than the value of the damaged coin. I would guess it to be a mix of nickel sulfate and nickel oxide, but just a guess from the color on my display. Jim[/QUOTE]</p><p><br /></p>

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