This article is from the VW Technical FAQ, by with numerous contributions by Jan Vandenbrande others.
A: Another religious issue...
In general: NO, unless your rotors are badly scored. If they are warped,
replace (it's cheap and easy to do). Call places like APS & WolfSport.
Note: If you take the rotors off yourself, turning them at a machine shop
costs very little.
 
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