[TheForge] Rust Patina Finish

[RIES NIEMI]

on 8/12/03 9:43 AM, Bruce Freeman at FREEMAB@pt.fdah.com wrote:

> The untested answer is a phosphoric acid pickle.
> 
> Bruce
> NJ

Now you are making me think. OUCH. anyway, when you said pickle, I thought
of nasty acids, which never stop eating through the steel. But Phosporic,
now that could be something else again. Never actually used it myself, but
all the big powdercoaters I have used have big tanks of the stuff, which
they dip the metal in before powdercoating, but after sandblasting. Powder
sticks real good after that. But it doesnt leave the steel looking normal-
kind of grayish. And they usually powdercoat right away- dont leave it lying
around for even a few minutes. So I dont think it would be good for a long
term finish without something else over it.