Clear coating for scuffs and scratches, processing in seconds No mixing, and no mess. You just need to apply it to the furrows of the scratch. Works by using UV protection in direct sunlight to activate the hardener/catalyst which is pre-mixed with the resins of the clear coating. This applicator pen is filled with enough PrestoTM Pro for several hundred scratches. Also works on colors. The clear fluid causes the surface to merge with the scratch.