Is rust on brake rotors serious? Brake rotors are made from cast iron and they will form an orange surface rust if left unused and exposed to moisture or water. The surface rust can form as quickly as overnight in humid conditions. Is rust on brake rotors a problem? Surface rust isn’t a big problem because it will wipe right off as soon as you drive the vehicle and use the brakes. But surface rust can turn into a big problem if you leave the car or truck unused for … Read More
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