Originally Posted by
unworthy1
red primer would be iron oxide, zinc chromate primer is usually yellow and usually used on aluminum.
zinc chromate pigment is yellow, and the primer that was used on aluminum aircraft in the 50s and 60s was yellow...the zinc chromate primer that we applied to anything metal in the air force in the 70s was a nasty pinkish red color. At least they called it zinc chromate, I was only the applicator. The zinc chromate that was used during WWII was a pale green color. (in a former life I was a static model junkie. Once an obsessive compulsive, always an obsessive compulsive, although the targets of the aberration have changed troughout my life).