Black Streak Remover - 32oz Quick, easy & effective. Instantly removes black streaks caused by water run off on fiberglass, & metal. No scrubbing necessary. Spray on/wipe off. Commercial grade. Test on painted surfaces.Applications:Fiberglass, metals WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.