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Thickening the copper patinating solution

I want to turn copper leaf that beautiful turquoise patina color. The problem is that the copper leaf is on a vertical surface and when I apply the patina solution, it runs. Is there a substance I can use to thicken the patina? And do I have to remove the chemicals before applying a sealer?

Ed S [last name deleted for privacy by Editor]
welder - Oakland, California, USA
2003

I can't answer from actual experience, Ed, but Fumed Silica [affil link] is a relatively inert filler that is used in rather similar applications; and barium sulfide is another possibility. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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