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<p>[QUOTE=&quot;Conder101, post: 84861, member: 66&quot;]Use a bandsaw and/or grinder to remove as much of the excess lucite as possible without damaging the coin. then dip it in liquid nitrogen.&nbsp; The extreme temperature change combined with the differances in contraction rates and the fact that the plastic should be quite brittle at the low temperature should cause most of the plastic to crack up and fall away from thermal stress.&nbsp; You may have to warm it back up and freeze it again a couple times. You can also &quot;hit&quot; the plastic right after freezing to capitalize on the brittleness of the plastic.[/QUOTE]</p><p><br /></p>

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