Starbrite Instant Black Streak Remover Starbrite Instant Black Streak Remover begins working on contact to eliminate black streaks under rubrails or anywhere else on the boat. In addition to being the best way to get rid of black streaks, this product is a great all-around cleaner for all marine surfaces and around the house. Ideal for use to remove black streaks or grime from fiberglass, metal, plastic, rubber, vinyl or painted surfaces. Features Quickly removes black streaks caused by water ru