steel wool and mothers mag n aluminum polish... like 000 or 0000 steel wool... putt he polish on the steel wool and start rubbing... the rust wil slowly starto go away.. take a clean rage and rub to a shine..
if its really bad you may need to use 0 steel wool or a wire brush/ wheel
yup... my fmf that i had on my 01 was badddd... from the fmf logo to the motor was rust.... wire wheeled it, steel wool and polish and it looked better.. not mint but exceptable