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<p>[QUOTE=&quot;900fine, post: 642942, member: 6036&quot;]Anyone who has cracked NGC and PCGS slabs knows there is a difference in the plastic. PCGS is much harder and more brittle; it&#039;s easier to crack out since it snaps. NGC is more pliable, and gives before it breaks.</p><p>&nbsp;</p><p>As a chemical engineer, I can talk the paint off the wall about polymer science but I don&#039;t that helps here. The bottom line is simple - find a low-end coin in a slab, try the scratch remover thing, and see.[/QUOTE]</p><p><br /></p>

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