Sounds like high spots from stopping while the friction material is hot and still
out-gassing...to bake a high spot on the rotor surface(s)
Take it out on the freeway up to 65MPH...NAIL the brakes several times and DO NOT STOP
Keep rolling so that the out-gassing will NOT bake a high spot, but leave an
even coating on the rotor surfacce
Or, change friction material to higher performance. The point at which it will
out-gas will be higher and most likely not bake on a high spot...though they will
too...if you get them hot enough
