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<p>[QUOTE=&quot;BadThad, post: 520485, member: 17261&quot;]While I&#039;ve never used these products, over the years I&#039;ve read about them and studied whatever I could find on the web (I recall finding MSDS&#039;s). From what I reemember, they are mainly detergent-based and likely of a pH such that they will cause permanent damge to the coins surface. I would only use these harsh products as a &quot;last ditch effort&quot;. I suspect they would also cause coins to tone oddly over time.[/QUOTE]</p><p><br /></p>

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