I don't know if I would try DWC directly on the rotor. Most rotors are made from a Iron based metal and DWC is meant to react against iron. I wouldn't try it on my car unless it was guaranteed nothing happens. I'm sure someone with more experience can comment but that's just my opinion
Very nice truck. My neighbor has one in black that looks amazing and sounds like a beast. I could tell that thing had some serious power when I drove it