It's not "paint". it's a layered composite material and was hard as hell just to apply. The lamination that was applied kept separating on every 4th or 5th layer and took forever to get it right. I remember North Amer Rockwell was firing/hiring engineers about every 2 or 3 days over that problem on the B1. Same technology was used on the various missiles being developed about the same time.
Well, for it not being paint, it is defnitly paint-like in that it was applied with a large CNC spraygun robot to avoid altering the geometry of the F117. It was a multi-layer finish though.