I agree, my frame is black. I didn't use any special type of paint, although I know they're out there. I power washed and scrubbed the frame and axels first, then rattle canned them with black. Believe it or not, alot of people bend down to check out the underside of the truck and always comment on how it looks. I think it looks like it should (not to perfect, considering it's 43 years old). I pride myself on trying to keep the truck looking nostalgic, if that makes sense. While I know some Zoner's want their truck to look like the day it rolled off the assembly line, I prefer alittle more of the combat zone weathered look. Once again, it's all a matter of taste and opinion. Truth is, I don't ever remember a truck in the motor pool with an OD frame or axels. That was 40 plus years ago so my memory may be hazy.
militarypotts Spec/4 Military Police, Vietnam Era, "Does the noise in my head bother you? Welcome to the Twilight Zone!"