starting from the begginning, tyres off & remove the valves, i personnaly am not a fan of grit blasting . i think its abit too fierce for our delicate special steel. i use a drill attatchment wire wheel dlsc, (very messy and dusty and time consuming but gets the desired result). finnish off with a coarse scotch pad allover by hand, black or brown is ideal next is a very light misting of etch primer (the one to use is upol acid8 in a red can redily availible in halfords but is expensive around15quid) inside & out and around the rim where the tyre touches, now i paint the rim area and the inside (rear) with thick black hammerite, do not use the smooth stuff as corrosion protection is just not good enougth. next two good thick coats of filler primer availble from any motor factor. the two top coat coulours are BMWtitanium silver and ford grathite grey.. after the silver has dried for around two days ,its time to mask up the clover leafs, this will take around two hours to do properly (PRACTICE MAKES PERFCT!!) per wheel. after the grey has gone tacky(about an hour), remove the masking and build up coats of laquer untill you are happy with the shine.each wheel will take about a week to do. as a finnishing touch you need a chrome trim ring, originals are near impossible to find but the MG owners club does a very similar item in stainless steel. 60 quid a set but worth it to me, you should end up with something that looks like this. i would realistickly budget for around ?100 in materiels.

I've just recently tried to get two wheels painted but it didn't turn out too well.

They were blasted to remove the rust and paint, primed, painted silver and then had the cloverleafs painted grey anthracite.

The blasting didn't achieve a smooth enough finish and the masking of the black areas wasn't perfect resulting in over-spray. I'd post pictures if I could but I'm going to have find another painter....or find two new or near perfect 14 inch wheels to match the two I have.