Boy, I saw an 04 rx330 and 04 g35 with the dreaded rust spots forming on the brake rotors. does it happen on the CTS too? How can this be prevented? Are stainless steel rotors one answer?

As far as I know all brake rotors get rust after water is on them. As soon as you move the car and then stop once or twice, all the rust is gone. Dont know about stainless rotors.

As far as I know all brake rotors get rust after water is on them. As soon as you move the car and then stop once or twice, all the rust is gone. Dont know about stainless rotors.

You can see those rusty rotors on any car where the wheel gives you a look atnthe rotors..if its been sitting on the dealers lot undriven for a while. As soon as you drive it a bit..the rust is gone. I even noticed it on brand new cars on the dealers lots.

Those two people above me allready stole my answer! :)

Is it the rotor or the metal brake pad dust on the rotor that rusts?

Is it the rotor or the metal brake pad dust on the rotor that rusts?I think its the calipers that you see rusting. The heat of braking I would say, makes it go away?:hmm:

Rotors rust, calipers usually don't, they're an alloy. I mean they might get dirty and dark but they aren't oxidizing as a soft steel would "rust".

The rotor can rust on the swept surface, which will be cleaned when you just drive the car for a bit. Or they can rust at the outside or inside edges. That rust can be slowed down by a special chemical dip, I forget the name off hand. But it only lasts so long.

I do not believe that true Stainless Steel is appropriate for rotors.

Brian