Protech Polymer Products, Ltd. PRESTO! Pro Auto Paint Scratch & Scuff Pen Treat Clear Coat Scratches & Scuffs in seconds No Mixing & No Mess. Just apply in the scratch groove. Works by using the UV in sunlight to activate the hardener/catalyst which is premixed with the clear coat resins This felt tip applicator is filled with enough PRESTO! PRO for several hundred scratches Works on ALL Colors. The clear fluid blends scratch with the surface