There are a few things you can do to clean rust off rotors. The first is to use a mild soap and water solution to clean the rotor. This will remove any built-up rust and make the rotor look new again. Another option is to use a rust removal brush. This brush will work best if it is soft and has a small head. Use the brush to scrub the rust off of the rotor. Be sure not to damage the rotor in any way! Finally, you can use a vacuum cleaner with an attachment that specializes inRust removal. This will remove all of therust from the rotor quickly and easily!