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<p>[QUOTE=&quot;desertgem, post: 2693947, member: 15199&quot;]The HDPE microbeads used in some toothpaste are abrasive, that is why it is there. They are used as sand is in &#039;sandblasting&#039; as well as an abrasive in lapidary work of polishing stones and jewelry products. They are mainly still found in &#039;CREST&#039;(tm) products as some states have passed laws banning them, such as Calif by 2020. The surface of a coin will be affected, the question is how much to be noticeable. Just as now with acids, it is always &#039;how much&#039;, and with beginner&#039;s use of any product, it is usually too much . Jim[/QUOTE]</p><p><br /></p>

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