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<p>[QUOTE=&quot;-jeffB, post: 3835988, member: 27832&quot;]If that&#039;s actually rust (and it apparently is), acetone will never affect it.</p><p><br /></p><p>When you&#039;re doing an acetone soak, be sure to <i>cover</i> your container with glass or metal to reduce evaporation. (Don&#039;t use a plastic or even plastic-lined lid; acetone vapor will swell and soften the plastic, maybe enough to droop into the liquid.)</p><p><br /></p><p>Acetone will not attack most metals. Steel containers are fine for it. Glass is a bit risky, as a broken bottle spilling all its acetone can (a) mess up polymer flooring, (b) create a serious fire/explosion risk if there&#039;s an ignition source, and (c) produce vapor concentrations high enough to be narcotic or toxic. A few ounces in a bowl, though, doesn&#039;t pose a big risk.[/QUOTE]</p><p><br /></p>

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