Primer color

[Whitney12]

I have a 1928 Model A Roadster PU with a dark green body and black fenders. There are many scratches in body and fenders and the paint beneath is a light blue. I'm trying yo determine my car has original paint or repainted with a light blue undercoat or if the light blue was an original primer or undercoat.
Any help would be appreciated.

 

[gdmn852]

Hello, I believe the original primer on body was red oxide.Usually primer is one of three colors on older cars , red oxide ,gray, or black. Light blue may have been optional color, standard color for trucks was usually unbuffed dark green with black fenders .

 

[Whitney12]

Thanks. I do see some red oxide in there but it' predominantly
that very light blue color.