I've been thru this a couple of time before Bill. I've got a bath with about three gallons of Behr concrete etch that I've stripped a bunch of stuff in. Behr changed their formula last year and took out the Phosporic Acid and the new stuff doesn't work at all on rust.
One of our members here was using Klean-Strip Phosporic Acid Prep & Strip that he got at Home Depot. His pictures looked like it left the metal with a fairly bright green stain. The Behr cleaner after rincing just left the parts with a very thin satin gray coating. I picked up a couple of gallons of the Klean-Strip last week but haven't had a chance to try it yet. The MSDS says the concentration is 35-45%. if it works as good as the Behr did I've got a BIG Rubbermade container I was going to put about tem more gallons in so I can clean some fairly large items.
Still won't be big enough to get the fender, hood or cab in thought, dang it!!!!
Denny Graham
Sandwich, IL
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