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<p>[QUOTE=&quot;-jeffB, post: 5316543, member: 27832&quot;]Yep, and we&#039;ll say &quot;bad batch of acetone&quot;, or &quot;the acetone stripped off something that was hiding the pink&quot;, or &quot;user error&quot;. None of which are provable, and all of which may be wrong.</p><p><br /></p><p>In light (sorry) of my latest re-read of that paper, I&#039;m leaning toward &quot;wet acetone produces vinegar more easily than I thought&quot;. If that&#039;s true -- if all it takes is acetone, water in the acetone <i>possibly from high humidity</i>, and ambient light -- that&#039;s enough for me to come over to the &quot;don&#039;t use acetone on copper&quot; camp, even if <i>most of the time</i> you&#039;ll get away with it.</p><p><br /></p><p>Someone in the Desert Southwest might have a hard time reproducing the effect. Someone in South Florida or New Orleans might have a hard time <i>avoiding</i> it.[/QUOTE]</p><p><br /></p>

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