[blucar]

I would not suggest the use of "phosphoric acid" as a metal prep, rust transformer. The products that are made for this purpose, JASCO, OSPHO, etc., have other chemicals added to the acid to make it work..
The commercially made rust transformers, metal prep, don't have to be washed,sanded off prior to the application of paint
Hmmmm? "I am tired of learning" I think that when a person gets to that stage in life, it time to lay down and die.