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>I also do not recommend turning rotors - just causes problems and reduces 
>the thermal mass you have to work with causing problems to reappear quickly.
I have always believed this, especially with ventilated rotors.  If there is
no runout, leave them alone.  Smooth, shallow concentric grooves are no reason
to have a disk re-faced.  The pads will wear into them just fine.
This may be a boring thread, but boring is the operation used to recondition
brake drums.  Facing is the operation for re-doing disks.  Turning is on the
outside of a cylindrical part, and few cars (not none) have brakes like this.
 Just a little Clavenism from a pedantic former hack machinist to lighten your
day.  :-)
Phil Ethier
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