asifniz said
I also had a similar issue. the mechanic removed the wheel, put the car on jack n put it in rd gear and grinded the disc with some stone to remove the rust.
I think your mechanic is from the stone age..
rajafhadk:
If you're really concerned about this then why dont you consult with your mechanic..
My opinion is that you shouldn't bother if its not making any sounds but if you feel any degradation in braking then it is a matter of concern.