In th past Ive used a toothbrush with some Belgom but today I decided to go electric - check out the results for next to zero effort :-)
Apply some Belgom

Gently scrubeach wheel stud whilst the brush does all the work


For comparison the top 2 have NOT been done, ones below have

Finished wheel after dressing and a bit of chavvy lettering white (I know its just something I like - think I read too many of my brothers US custom car mags back in the 80's LOL)

Only thing I'd suggest is that I was using a cheapo £4 electric brush which if you held too close would stall so reckon something with a more powerful motor would really be the business - was actually a pleasure cleaning them which is the first time Ive ever felt that!!!!