Powerful Cleaning Action - Specially Formulated To Tackle Rust, Dried Fish Blood, And Leaf Stains On Fiberglass & Painted Surfaces10Gel Spray Formula Sticks - Clings To Vertical Surfaces For Better Stain Penetration Without Run-Offs Or Drips10Removes Waterline Stains - Easily Eliminates 'Yellowing' Tannic Stains And Tough Waterline Stains From Boat Hulls, Plastic And Painted Surfaces10Easy To Use - Simply Spray Affected Area, Let It Soak Until Stain Disappears, Then Rinse Thoroughly With Water10Targeted Application - Gel Spray Design Ensures Precise Application While Limited Drips & Runoff Ensure Only The Stained Area Is Treated