3 step process
Well, four if you count the paint stripping process...
I first used "Aircraft" stripper, (sold in quarts or gallons at automotive stores) and cleaned / dissolved the old painted surface. I used (several pairs)
heavy duty rubber gloves with heavy steel wool after the strip chemical worked in order to remove the paint and flash.
Next I washed the rims and cleaned all the inner wall build-up from the brake pads so all I had was bare metal.
From that point I sanded the rough spots left from wheel weights, then filled the pits using steel epoxy. After cure, I sanded them all flat and smooth.
Step 1: Apply the primer. I used DuPont self-etching primer, although you can use non-etching primer (prefer light gray) on Aluminum. I spray with a gun, not out of a can.
Step 2: Apply the base coat. I used a bright "silver met", basically a bright silver paint used for wheels. Ford has a bright silver wheel color so I used that. (don't recall the number right now but I have it) Again, DuPont. This is a flat paint, very easy to apply in a uniform base coat.
Step 2A: There are 4 small spaces on each wheel that need to be filled in with black paint. Base coat dries really fast so you can mask these areas and use flat black spray paint out of a can to fill in the black spots on each wheel. Or not... (your choice)
Step 3: Apply gloss top coat. The brand I use is Imron, but this requires you wear a special mask. (not a cheapie!) Imron is a 2-part mix that cures hard like epoxy but shines like no other. I applied 2 coats, about 1/2 hour apart. It's important to get a uniform coat without drips. After the gloss coat, I baked each rim in the oven (your wife has to love you very much for this!) at 225 degrees for a full 30 minutes. (exhaust fan on!) Then let cool slowly for at least an hour. The paint still cures within this time so don't rush it.
That's it in a nutshell. Easy way to blow an entire weekend, but the results last a whole lot longer.