Take the car out on a deserted freeway and get up to say 85mph, then hit the braakes kind of hard and slow down hard(only if no other traffic) to say 40mph.. (at that high speed your brakes will NOT lock up..)
This will make your brakes heat up and 'clear off' any stuff on them.
I used to do this regulary (once a year or so) on my Contour SVT, except i would go up to 130mph or so.. Then hit them as hard as i could.. It really turned into air brakes the first two times, from junk gassing off the pads. But after that never any issues stopping.
As long as no one else driving near you not so much of an issue.
Late night, around me, mainly after 11Pm is nobody on freeway at all, weekdays. Skip bar closing time.. LOL
Feel free to call me insane etc.. i did it, no problem. [smackbum]