I used the Duplicolor Caliper Paint with Ceramic stuff this past week while my plastics were being repainted. I think its like $15 or so. Comes with cleaner, brush and paint. the cleaner did all the work for me, all I did was spray once, spray again and then wipe off any problem areas (minimal for me). After that its just normal brush painting. there is WAY more than enough paint. I am doen and still have about 90% left in the can. Basically you have to paint, wait about 5 to 10 minutes, repaint, wait repaint, and so on. By my third coat is was pretty even, looked really good. When you are painting it looks like it leaves streaks and will freak you out a little. just try to smooth it out and keep applying layers. Eventually it evens out and looks really nice. Ill have everything back together hopefully tomorrow and ill post the caliper pics with the bike pics.
Truthfully I would say total project a little over an hour, total work 15 minutes depending on how long it tkaes you to remove your wheels. Just do it on a rainy day if you have a garage and evey once in a while go out and repaint.
Spray cans have some overspray and you have more to mask off, but the painting is quicker obviously. The hand paint seems stronger, thicker, and better my 2 cents