It has to do with the hot air w/ internal vained directional rotors. If you have them the wrong way, you will get negitive results, if you have them the right way, you will have positive results.

Brembo did a good job explaining it, take what I said for what it's worth.

I used G2 brush on aircraft brake epoxy (can be bought off ebay). Those rear calipers were painted using the same kind of paint 2 years ago, and hey look, they are still glossy white. The brake dust/dirt can literally be wiped off w/ a rag. It's the same kind of stuff used on factory colored rotors such as on Porches, big brake kits, etc...