Best way to prep rallye wheels for paint?

The quick and dirty way to do this is with a cup wire wheel on a grinder.
Make sure you stay away from the valve stems, either mask them off or put an old chunk of heater hose over them. If you nick them with the wheel, they are junk.
And for god's sake wear a face shield, heavy duty gloves, and a thick coat because the wire in the cup tends to come off once in awhile and will stick into you!
Don't use a lot of pressure and let the wheel do the work for you.
It will buff off the rust scabs and remove the paint pretty well.
Then i would clean it up and use a rattle can self etch primer, the stuff i use is pro form and it comes in grey.
The back side of the wheel you can use duplicolor semi gloss black.
Then either get some chrysler rallye wheel paint, or something from duplicolor like the factory match paints in a color that is light silver with hardly any metallic in it if any.
Spray it on and it dries to an almost semi gloss/flat appearance. It should take only 1 can of primer and a couple of cans of duplicolor, put the coats on light and they dry quickly. They are lacquer based.
Don't worry about the overspray of the silver on the black, this is how the factory did them!
I'm going to do this in a few weeks to my wheels, and this is what i'm doing......
The best way of course is to take the tires off the wheels and sand blast them, but this way will get you by without dismounting the tires etc.