Ok, am I going to open up a can of worms?

[TwinTurboGTR]

Now the 4.8is has 106K on the clock and the brakes were done 2 months ago from BMW. Now my calipers look... well.. UGLY. They are rusted all over. The hubs are in good position.

So with that said, I want to spray the calipers. Now I am going to spray them black. I want to spray them with a metallic flake black but they don't have that color in hi-temp paint. So here are my questions:

1. With the current mileage, I want to overhaul the brakes. Since I am going to unbolt everything and clean everything up, it may be a good time to do an overhaul. Only thing, I have never done one before. Am I going to open up a can of worms by doing an over haul? How difficult is it to press the piston back in?

2. There is a debate back and forth about which paint. Some say they swear you can use regular auto paint and some say you HAVE to use Hi-temp paint. Which have you guys used and with what results? I've read in a few places, even here, that the caliper itself doesn't get hot, only the rotor. I don't know about you, but my wheels and caliper get too hot to touch.

3. When I unbolt the caliper from the line, can I just hang the hose right side up so the fluid doesn't cont to run out? Or in theory, if I leave the cap on the reservoir on and let the line hang, yes it will drip, but only for a little while because vacuum pressure will stop letting it run. Now normally, I don't care because I am going to be bleeding this sucker anyways, what I am afraid of it if air is stuck in the ABS unit, I think you needed to hook it up and run tests to the pump to bleed. Pedal pumping won't do it. What are your guys thoughts?

4. Now I know it is easier to get a rebuilt caliper. But from what I see, they are from Cardone, Neugen (or however it is spelled), etc. I don't know how these perform and I would like to keep the factory ATE's on there. It would make life easier because the unit is all set, just need to clean it and paint. But are these Rebuild Manufacturer any good? I've heard of Cardone, but not Neugen.

Thanks in advance guys!