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<p>[QUOTE=&quot;JCro57, post: 7803360, member: 92083&quot;]I&#039;m very well-aware zinc can corrode on its own, and of course what is known as &quot;zinc rot&quot; (which is also covered in my book). However the ICG coin is from acid corrosion. It is a common experiment in chemistry classes, including at the school I am at. The ICG coin has all the hallmarks of acid, and not natural, corrosion.</p><p><br /></p><p>Also, friction wear from normal handling tends to smooth out details, not cause pitting or thinning of details. Look below. This is NOT friction wear. The pitted, fuzzy appearance is from an acid, and not prolonged exposure from being buried somewhere either.</p><p><br /></p><p>[ATTACH=full]1340110[/ATTACH][/QUOTE]</p><p><br /></p>

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