Please forgive me for being mechanically un-inclined these days...
one month ago, I had my indy change pads and discs all around.
We used Axxis ceramic pads and Zimmerman discs.
During break in, it seems that the brakes got too hot, the pedal never got soft, BUT the rear discs are blueish and there is a shake when gently braking at high speeds - sometimes!

It feels like the front discs are the ones that are off, but I was told the blue is bad on a disc!

My indy also just told me that the zimmermans they sell at the dealer and those sold aftermarket are not exactly the same, dealer is more heat resistant.

That same day, he also installed a new upper control arm, so I was originally unsure if the problem was that or brakes....
What the verdict on blus discs???