Underhood Black is the correct shade of black, having just the right 10-20% semigloss finish most car manufacturers used on radiator supports, inner fender walls, lug wrenches, jack bases, underhood brackets, and other parts. Hardware store black paints are either too thick, too glossy, or the wrong color. Just clean, degrease, and prepare the parts well, then spray on for a in.factory-likein. finish. This acrylic lacquer withstands up to 250 degrees F and goes on thin for a satin smooth finish which does not hide surface details. One aerosol covers 6 square feet.