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<p>[QUOTE=&quot;Kentucky, post: 2222632, member: 33176&quot;]I wonder why this works...I mean when the coin is struck, the date is a recess in the die and the metal expands into the recess, compressed from the area around it.&nbsp; If the metal of the date is more porous than the surrounding material, would it be more susceptible to the acid...or, if using Nic-A-Date would it soak up the chemical better and just discolor?[/QUOTE]</p><p><br /></p>

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