How long does it last??? I spent about eighty bucks on a concentrate that was supposed to make 10 gallons of rust remover. It did remove rust if you left it over night but after a small amount of rust removal it quit working.
Lately I've been using Behr concrete etch with phosphoric acid. It removes rust, plating and paint if left long enough. And it keeps on removing it. The parts come out looking like they just came out of the press at the stamping plant. Problem is Behr took the acid out of the product last year and I can't find anyone that sells phosphoric acid anymore for a reasonable price. I'd like to get about 10 gallons of it to dip larger parts in like upper and lower grill baffels, core suppports, exhaust manifolds, brake drums, etc.
Denny Graham
Sandwich, IL
