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<p>[QUOTE=&quot;Jaelus, post: 3696579, member: 46237&quot;]I use q-tips for applying light machine oil to iron, steel, and zinc coins, and also for spot treating with verdicare. I carefully <i>roll</i> the head of the q-tip across the surface like a wheel to do the application, and there is no rubbing. Basically this just boils down to technique. Many of the coins I treat in this way are already problem coins and just extremely rare in any condition, but I&#039;ve never had a coin get hairlined from a q-tip using this method.[/QUOTE]</p><p><br /></p>

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