I Went to HF and got wire wheels for die grinder, and 4" grinder, and some hand held wire brushes , emory cloth. Cleaned all the guts of the doors with wire wheels/brushes, scotch brite ect. Replaced all the hardware I could with new ,Replaced the rollers, did not reuse the PITA clutch head screws.
Soaked the small parts in KBS rust blast ,leaves a zinc phosphate coating on the parts . I primed and rattle canned every thing.
Oh and drank lots of beer (as always)
When you go to replace the vent window rubber , I would NOT use LMC stuff, mine started falling apart after 1year , its still soft but is cracking splitting ,plain junk, I bought some from soft seal to replace it .I have not done it yet its a PITA job.