Step 1 - Unbolt each caliper from the car, then remove the calipers from the lines.
(i forgot to take pictures for the first few steps)
Step 2 - Remove pistons. I used compressed air to pop out the pistons. You can also leave them hooked up to the car and then pop them out with the brake pedal. To do this, plug off 3 of the lines, and then hook each one up separately to the remaining line. Unbolted from the rotor, there is nothing to hold them back. Be careful, they can pop out with some force.
Step 3 - Remove the seals, guides and all other parts and chuck them.
Step 4 - Clean. And then keep cleaning. I used a metric shit ton of brake cleaner. If there is any corrosion on in the brake cylinder, you can use a brake hone to smooth it out. If there is any corrosion on the piston it will probably need to be replaced. You can use a wire brush on the exterior of the caliper and scotchbrite on the inside. I scrubbed and brushed and rinsed with brake cleaner to try and get them as clean as possible since I was repainting them. If your car is older, it isn’t a bad idea to wear a mask since pads used to be made of asbestos. It’s also a good idea to do this in an open or well ventilated area. I didn’t heed that advice and i am sure I am down a few brain cells.
Step 5 - Mask off the bore for the cylinder, the guide holes, the bleeder, the brake line connections and the bolt holes and apply a few coats of caliper paint
Step 6 - Enjoy your freshly painted calipers
Step 7 - Lay out all of your new parts on a clean work bench. In my case, I ended up replacing a couple of the pistons because of corrosion. And then reassemble everything with some assembly lube.
Step 8 - Good as new
Step 9 - Put back on the car and be confident in your braking system