I would have thought someone else would have the answer on the 70-72 ones.
I will give my 2 cents but on my 1973 it was bare so light rust.
No evidence of paint.
I did push the question back to top.

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough