After driving for some 10km my barchetta likes to do the rotating/squeeking stuff on every rotation , it stops squeeking when you press on brakes or changes how bad it makes the sound when you steer certain direction.
99% I believe that one of the break discs has just got some usage on it and maybe some rust/uneven wear or some lip somewhere, but when inspecting them they more or less feel similar and nothing really wrong with either of one.

Also the break pad levels are totally fresh, but I can't possibly detect which wheel exactly makes the sound. I do not want to go out and change the Discs for both axels as it's not exactly cheap to do so want to detect which one exactly is responsible for that and change only for that axel.
I have tried squirting some stuff on each disc and then trying to drive, but that didn't really worked for me.

Some one standing near the car while you use your brakes even if driving slowly should be able to tell where the sound is coming from. If pads are good the it certainly can't be serious.a bit of rust will not cause a problem.

Don't drive it until the new radio is fitted, then turn the volume up to max. Problem solved!

Jack each side of the car up, and rotate the wheels by hand, you should be able to notice where the problem is.

Jack each side of the car up, and rotate the wheels by hand, you should be able to notice where the problem is.


OK, you could try that I suppose. Like my idea better though!