Hi Phil,
Did mine myself, used some caliper and brake caliper, drum and rotor VHT paint from US Automotive, it seems to be fine on the calipers but has peeled on the master cylinder, probably due to me being ham fisted when filling up. the caliper has to be perfectly clean inside and out, all oxide removed. On the exterior I used my Dremel with a little abrasive brush, the inside was not too bad except the seal area which must be really clean for the seal to sit in. The threads I protected by inserting old bolts which was handy for hanging the caliper up while I sprayed it, the mating surfaces were masked off, I did this using masking tape put on over sized, then used a Stanley knife to cut around the caliper shape.
Cheers
Den