Supreme Products Cover Magic Spray in Brown 400ml. The Supreme Products Cover Magic Spray can be used to cover marks and scars and stray white or light coloured hairs. It can also be used to blacken or darken legs and add definition. Spray from a distance of approx 10 inches to cover stains and brush with a soft brush to disperse. As the Cover Magic Spray dries to a matt finish, you can apply a light finish of Supreme Products Glistening Oil to give a sleek, shiny finish.