Fast cleaning formula instantly removes difficult black streaks Easy-to-use spray-on cleaner Wipes off effortlessly No need for compounds or other harmful abrasives on boat surfaces Tough, yet safe for use on fiberglass, metal and paint Our 3M™ Marine Black Streak Remover is just what you need for removing stubborn black streaks from your boat caused by water runoff, bumpers, shoe treads and more. This cleaner is specially formulated to instantly remove these difficult black streaks with minimal time and effort. Though it’s tough on streaks, the remover is safe for fiberglass, metal and painted surfaces.