some scoch pads com in handy for rubbing doing, and use a small bucket of water for ur wet and dry, 1200 id use,
first id get the tyres off the wheels, and the weights,
then wash the wheels down with a wheel cleaner, give them a good scrub up in the inside, stay away from anying with silicones in it, as it messes up the paint.
rinse off with a degreaser and then set to with rubbing them down, make sure you have keyed up the surface of the wheels so the primer can get a good hold.
once ur happy with the wheels and are ready for primer, clean the wheels with pannel wipe, and stand them in a way in so you can paint as much of the wheel as possible. a few light coats of primer to see how it gose on, or have a try on carboard first, you can save time buy drying inbetween coats and help the process if ur painting in a cold garage or shed hot air gun works wonders.
id do the primer and then leave it a day, before doing the gloss,
just remember 90 percent of painting is in prep.
iam no painter or pannel beater but hope this helps a bit.