I'm not sure I'm knowledgeable enough to answer your question, I've never sanded rotors, I just rebed and it works. Perhaps I'm not sensitive enough to this. I probably rebed my rotors a couple times a year with all the stop and go traffic.Thanks. The Cool Carbon instructions with the pads say to do 70-20 repeatedly at low, medium, and hard braking. I was on the highway and couldn’t slow down to 20mph. Stupid me. Live and learn.
Would you suggest to first remove any glaze on the rotors by lightly sanding them with fine sand paper and clean with Brakleen? Or is this not necessary as long as I rebed as you suggest?
Here's the biggest thing: If you get your rotors hot and then stop completely, you'll leave residue where the pad stops on the rotor and that will create a shimmy or vibration.
I'd try rebedding, and if that doesnt work, try a little sanding. What also works is using a track pad which will remove all glaze from street compounds.