Nissan Murano Impul-Tuned

One of the car in the service center having brake sequal noise everytime during initial run and noise dissapeared after 30 minutes.

I understand a sport's tuned specification brake pads should be operating normally under at high temperature, but will behave abnormaly under low temperature (brake noise, could be vibrating?).

I want to ask did anyone of you tried to put pencil lead on the brake pad to reduce the noise before? Drill a small holes on the brake pad, and insert the pensil lead (carbon) into the holes. Did it really works?

Thanks in advance