take them off and get them skimmed, and when you put the discs on did you clean the hub back to metal and use a dial gauge, I had this problem when I first got my 300 it been fine since I just cleaned the hubs and used a dial gauge to get the run out down to a very small amount, It takes a bit of time to do as you have to keep removing the disc to move round to the next stud until you are happy.
Lee