If the pedal doesn't pulsate, the rotors are smooth, and there isn't much of a lip, I'd just throw a set of pads on. I've been round and round on this with a couple of other professional mechanics. They call me a pad slapper, but I have read bulletins from some of the major car mfgs who state that if the conditions I stated in the first statement are satisfactory, just install pads. As to squeaking brakes, that comes with the advent of disc brakes. MB sells teflon coated plates to install behind the pad, and most pads now come with them attached. They really work. A couple of other factors also affect brake noise. Low humidity seems to cause more squeal. Also people who start braking for a stop light in the middle of the block seem to have the most problems with noisy brakes. People who drive full throttle or full stop tend to have quieter brakes. As an example wet your finger and continue to circle the top of an empty wine glass with light pressure. Soon the glass will start to sing. Increase the pressure and you get no sound.

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