For larger jobs, mix with water into a 1, 2, or 3 gallon pump sprayer. Slimy Grimy is the perfect boat bottom cleaner; removing stains on boat hulls without scratching the Fiberglass, leaving boats "showroom clean." Spray away orange oxide stains on exterior of homes and remove dirt and grime from wood decks, fences and all exterior surfaces enhancing the look and longevity of wood, stucco, brick, aluminum and all types of shingles. Rust stains disappear to show the beauty of your environment.