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<p>[QUOTE=&quot;desertgem, post: 515873, member: 15199&quot;]Hi Eddie,</p><p>Yes, there were risks there that did come about. As you might guess from the before photo, it didn&#039;t get much action at the local club auction, and I needed to know how the solution would react in such a case. So the price was worth it to me.Of course,I hoped much was PVC gunk and would come off with acetone, but no. I certainly hope I am still around in 2029.:whistle: Maybe my IRA will be back!</p><p><br /></p><p>Hi Drusus, </p><p><br /></p><p>&nbsp;&nbsp;&nbsp; Physical action to remove loose verdigris does help the chemical action also.&nbsp; I have experimented with some other IHC and found that a toothpick with the tip soaked in water or verdigone&nbsp; can help remove some of it and speed up the reaction. However, in this experiment I was very careful to do it with only the verdigone as I wanted to see how much effect the chemical had on the patina, rather than how much verdigris was removed or how long it took. That is why I used controls in distilled water for the 45S and the 60D uncs. Several times I have seen postings that indicated the patina would be affect by any removal chemicals and I wanted to know for sure before I contradicted general theory. I knew it would take off the verdigris from experience, but I honestly wasn&#039;t sure if the patina was altered any. After this ends,&nbsp; I will fell more secure in commenting.</p><p><br /></p><p>If the UNCs do OK, I thought maybe I would try some proofs <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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