Had the same thing on my Black TA bumper after 6 years. Took it to the body shop, they called it "peppering". All little ding marks from stones and such. Only way to fix it up, is to re-paint it - and thats exactly what I had done. Car looks brand new again with just the front mask re-painted!
You know you drive an F-body when...
19) You secretly watch people in the parking lot as you start your car up, and you get a kick out of it when they turn to see what the hell that was.