Hello guys, we got a lot of attention on another forum, so I just wanted to inform you guys of what we have going on @ RacingBrake. To summerize our rotors they are made of Alloyed Grey Iron, and Coated with EDP (Electro-Deposition Paint)to provide lasting protection against corrosion. RacingBrake manufacture's their own rotors. Please let me know if you have any questions.