Please feel free to add or amend in any way you see fit, spelling and grammar.
Paul
It really depends on how bad the wheels are and what sort of finish you want,
as to how you go about it.
Tools you will need:
Drill
Grinder or DA sander and 120 grit sanding pads.
Wire wheels
Soft wire brush
Scraper
3M Rubber sanding block (curved on one side)
Wire wool
Bucket
Washing up liquid
Masking tape
Safety glasses
Rubber gloves
Wet & Dry sand paper, 120/240/320/400/600/800/1000/1200/1500
Autosol or similar
Belgium gom
Mutton cloth
Removing the paint and lacquer.
If the rim is lacquered you need to strip this off, and the same for the centers if your going to repaint them, easiest way is to get them bead blasted, the other not so easy way is paint stripper, very messy but does the job. If you go the paint stripper way make sure it is washed off leaving no trace of the paint stripper other wise you'll have problems when you start to paint them. Use the drill, wire wheels and wire wool in those hard to get to place's but don't put to much pressure when using the drill as it will eat into the rim. Depending on how much paint and the type you may have to apply the paint stripper more than once.
If the edges of the rims are pitted or lightly curbed you can use the grinder or DA sander for these, then start with some coarse wet and dry paper 120 or 240 grit, if you have a DA sander so much the better, but again use only light pressure.
Using the wet & dry:
Fill your bucket with water and add some washing up liquid, just enough that you get a few bubble's when you whisk it up, this will act as a lubricant between the paper and the surface of the wheel. Always start with the worst rim first, that way you can gage what grade of paper you can start with on the next rim, because the higher grade of paper you use the less work will be involved.
If it's only minor marks that you are trying to remove, start with 600 grit, if the marks remove easily go to the next paper up if not, come down a grade.
Starting to sand the rims:
Choose the grade of paper you want to start with and cut it into 3 strips fix it onto the M3 block, if your starting by rubbing down the inside of the rim fix it so that the paper is running on the curved side, having dipped the paper in the water you can start to rub the rim down, I found that having the rim upright and at about stomach height was best, work your way around the wheel using straight strokes about 20cm long, rinsing the paper in the bucket of water when you feel some resistance between the paper and the surface of the wheel, do this until you can no longer see the marks. Work your way through all the grades of paper, make sure you remove all the marks left by the previous paper before you move on to the next other wise when you do the final polish you will see them.
At this point I would do any painting that has to be done. Degrease the wheel, mask up the rim, prime, paint and Lacquer as required.
Polishing the rim:
This is the point where you see how good a job you have done with the wet & dry. If you have a polishing machine so much the better, if not cut 2 piece's of the mutton cloth add some Autosol and with the same straight movements as with the paper go around the wheel until you have a shine you could shave in.
Belgium Gom:
This was recommended to me by Bigman and Funkysi, this is used as the final polish to remove any marks left by the Autosol.
Dave, Make sure it comes with the harness wiring loom. http://cgi.ebay.com/ebaymotors/OEM-NISSAN-300ZX-Z32-90-96-PTU-POWER-TRANSISTOR-KIT_W0QQitemZ360156222261QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item53dafbd335&_trksid=p4506.c0.m245&_trkparms=65%3A12%7C39%3A1%7C72%3A1171%7C240%3A1318 Paul