i can tell you that they do rust. i was a little disappointed, but they do rust. it may have been because of all the salt that they put on the roads this past winter, but there was rust on there. you can rub some of it off though. its kind of like the type of rust you get on your brake rotors when you wash your car, but once you drive, its gone. i think another thing that affected it was the fact that all of it kept building up. its not like brake rotors when everytime you drive they get rubbed off. im not sure if you could follow that, but.............yeah. hope that helps. rust or not, its still a bad ass suspension.