Do I really need to "prep" the metal before using a wash primer? At the place I got the primer, they have never heard of such a thing, they only and allways scuff the metal with scotch brite.
I can get some DuPont 5717S metal conditioner, but according to the tech sheet, aluminum is not mentioned...
I can get some DuPont 5717S metal conditioner, but according to the tech sheet, aluminum is not mentioned...