It all depends if you're taking the calipers out from the car to paint them. If not then i suggest you get a can of brake cleaner, spray them and let it soak, get a old spunge with soap, and wash them. let them dry. Then get a can of brake caliper paint (it's a high temp paint) or anything over 500'C apply first coat and by the time you've gone around to do all, the first one should be ready for the second coat. Apply as many as you can, then get a can of clear paint, doesn't have to be high temp, and give it as many coats as possible. if you have a heater gun try heating them up after every coat. Don't get too close as it will burn the fresh paint. Let it sit as long as possible. The paint will stay fresh till the car is driven so try not to touch them. Oh yeah!!! Don't forget to tape up your discs before you paint!!!! This should take about 1-2 hours! But they will look great and i can almost swear that the paint will not peal and you can wash them as many times as you want!