Just posted an update further up. I asked this question on the A12 board and Jim replied there. Looks like it depends on the vendors that supplied the parts as to the finishes, particularly the rear springs is what I'm referring to. Further evidence in this thread alone shows one car with painted springs and one with natural. I guess it's just a matter of detective work to find out what originally came on your car to begin with and replicate as necessary.

Mopar cars are a bit like golf. Consistently inconsistent. Fun stuff!!! Thanks for the answers on the other items gents!

Cheers