I lightly smoked mines with this window tint spray on stuff I got at Hobby town usa in the Regency 20 movie theaters plaza.

Its in a small white can with a black top. It acts kind of like VHT nightshade.

IMO, I think 1gs/2gs look better if they only smoke the actual brake light part and instead paint the center part the same color as the car.
Im not much for the unibrow look; thats why i painted the center piece of my car between the brake lights to prevent that look.