It wasn't me who posted the thread, but I did refurb my gen7 standard 16" alloys, which are now on the car as my winter wheels.
I did that by getting a wirebrush drill bit (just a cheap one for a couple of quid), used that to brush off all the paint and corrosion and get back to the bare metal, then I used a course sandpaper and some elbow grease to get any scratches from the brush smoothed out. Next I used fine wet and dry (and lots of patience!), then I sprayed them with etch primer, about 4 or 5 coats per wheel using wet and dry between coats to get a nice smooth finish. To finish them off I gave them two or three coats of silver (the best match I could get to the original colour) and several coats of clear laquer.
I know this hasn't exactly answered your question, but bottom line, I used a two quid wire brush in an electric drill and get pretty good results! I'm at work at the minute so I can't upload any pictures right now, but I can do if you're interested in the level of finish I achieved. Hope thats of some help mate