Just wanted to throw this out there for an FYI.
I've bought HUNDREDS of rotors over the years, tried turning different rotors and here is what I've learned.
If you groove the rotors (like letting your pads wear out and still driving it), it can be turned/fixed and will stop smoothly.
If your rotors are warped and you think you can turn it to fix it - it's NEVER worked for me - never stops smoothly.
Warped rotors MUST be replaced IMHO.