Eastwood Detail Grey, or Brandon Industries (they vend at Carlisle) has a Stainless Paint I like a lot both are good for raw metal look.
Lower and Upper control arms, tie rod ends and front sway are natural/raw. The LCA's would have been coated in cosmoline (honey appearing coating).
Sway bar mounts are natural as well. I usually just clear-coat them.
Drag link...some may disagree, but I paint them black.

Leaf springs. Some will say natural and others black. I think the prevailing theory is that black was likely on later 1970 model year cars.
I have tried to keep rear springs looking decent when painted natural, but if you are going to use the car paint them black (IMO). They will rust in-between the springs and you can't keep touching up the natural look. Far easier to touch up the black as needed.