With the coated rotors, does it appear to get as much surface rust as you did with the factory rotors?
Also, as you mentioned, greasing the caliper pins is very important to proper function. One of the side-affects of good pin lubrication, is noise-isolation. The grease inhibits the frequencies/noise from resonating into the chassis and being amplified.
I had this when the car is new and complained to the dealer and they lubricated the caliper pins and the noise is gone. I guess with the well lubed caliper pins the caliper floats and center itself better preventing both pads from unevenly pressing on the rotors especially when backing up. I recently changed to coated / crossed drilled rotors and did not forget to lube the caliper pins. so far no noise.
Just park in the garage.
And the OP has less than 2 dozen posts in 5 years - talk about not contributing...!
I used to have them on all four wheels, but ever since upgrading my front brakes I only get it from the rears.
Bumping an old thread I know. Curious if those of you who replaced your rotors with the higher-end ones with the coating saw less rust/noise when backing out.
+1 what he said but with Centrics.Yes. I've changed my front and rear rotors with Powerstop untis with e-coat. Never had another issue with that noise. Flash rusting after a good rain is almost NIL at this point also.
When you say your front brakes do you mean just the rotors or the pads or both?