Wasnt too difficult to do,
Stage One
Took each wheel off one at a time. Gave them a good clean with detergent and some machine cleaner then used emery paper to get all the really bad crap off the wheel. I didnt have too many dints or gauges in the alloy but I just used a well known epoxy resin ( bodge) to fill any holes in, after the resin dried I just used wet and dry ( kit from Halfords that was on offer at the time) sanding to get the alloy as smooth as possible.
Stage Two
After the alloy was totally dry I masked the whole wheel up which was probably the most time consuming thing to do. Then used an undercoat primer just one coat. Then I used simoniz alloy wheel paint (cheapest I could find as I was just going to test it on the spare wheel at first), applied three coats allowing drying time inbetween of about 10 mins. After an hour I applied 2 coats of Laquer.
That was it job done I did two wheels in a day so drove around for one night with one side of the car looking a bit rough compared to the spanking new alloys on the other side . I will say however that I'm not 100% happy with the colour, thinking about trying it again with a better quality spray