clutch spider with rust pits

[fourbarrel]

I've got an old spider lying around that to me is worthless but mabey someone else can tell me how to repair rust damage to the shafts.I am guessing that the steel center hub is pressed into the aluminum part somehow which leads me to the part of mine that is damaged.This spider was in an old clutch I had given to me for parts but once I got it apart there wasn't much left that was actually useful to me.Both of the shafts that the bushings ride on are marked up where rust has pitted them and if I took them somewhere to have them polished down clean then they would be too small for the corresponding bushing and to my knowledge nobody sells an oversized bushing for the sliding sheave and cover.I could take the spider to a machine shop and have the shafts built up and then turned down on a lathe but then I'd be left with less than smooth surfaces which would chew up the bushings unless there was some way to smooth out the surfaces to a factory finish.
Anyone got any ideas?I'm on the verge of throwing this thing into the scrap metal pile if I can't repair the pitted damage but then it may end up being an experiment to see what can be done to it.As on old friend used to tell me it's pretty hard to spoil a rotten egg.

 

[Mills]

The only thing that I can think of to do as an experiment is to have the machine work done to it and then have the machined surface hardchromed. I would suggest having the shaft ground to the right dimension rather than having it turned on a lathe. It will be much "smoother", more concentric (center of shaft is lined up with center of spider) and grinding can hold a much tighter tolerance in most cases which means it will turn out to be true round then ovaled. whether it is ground or turned, the setup of the machine and how the part is fixtured will be your most important factors as to how it turns out.
Mills