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<p>[QUOTE=&quot;kanga, post: 642768, member: 9270&quot;]If I read the NGC statement correctly, the coating is for scratch protection. They likened it to the coating put on glasses lenses.</p><p>&nbsp;</p><p>As nearly as I can tell, no chemicals are used by these particular polishing compounds.</p><p>They are strictly very fine abrasives, like jeweler&#039;s rouge.[/QUOTE]</p><p><br /></p>

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