This can be done in 5 minutes riding around your hose, you need this: Spray the rotor on both sides, ride around dragging the brake then before it dries out, spray it again washing off the black dirt. Repeat 5-6 times. The key to this is keeping the rotor wet all the time. When the brake is bed in, normal braking will be dead silent. If it's still making a rubbing noise, it still needs some bedding in.