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<p>[QUOTE=&quot;-jeffB, post: 1705728, member: 27832&quot;]The metal was on the coin; now it&#039;s on the tabletop. If that&#039;s not &quot;moving&quot;, I don&#039;t know what is. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Seriously, I&#039;m pretty sure the guy at that link is missing something about whizzing, but I don&#039;t have enough experience to clarify it. I do know that I&#039;ve got plenty of silver coins with scratches that have raised ridges along the side, and I&#039;ve assumed that whizzing would do the same thing, only on a different scale.</p><p><br /></p><p>I&#039;m pretty sure that the soft nylon brushes and the carbon-steel bristles this guy tried aren&#039;t the only alternatives -- if I were trying to do the same experiment, I&#039;d probably <i>start</i> with brass bristles, which are of comparable hardness to the coin material.[/QUOTE]</p><p><br /></p>

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