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<p>[QUOTE=&quot;SuperDave, post: 2416847, member: 1892&quot;]Acetone does not need to be &quot;rinsed.&quot; It&#039;s so volatile that it evaporates without a trace left, so as long as the last thing which touches the coin is pure acetone - and there&#039;s nothing left on the coin to be removed - you&#039;re good.</p><p><br /></p><p>If you plan to &quot;work&quot; the coin with a q-tip, do so with the coin<i> in acetone</i>. Underwater, so to speak. This will carry away any particulate matter instantly, rather than have it stick to a semi-moist q-tip (acetone evaporates too quickly for a q-tip to stay wet for long) or be moved around the surface.&nbsp; A wet q-tip probably won&#039;t scratch a wet coin, but what you just removed with it will.[/QUOTE]</p><p><br /></p>

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