For larger jobs it is easiest applied in a pump sprayer. Mix with water in a 1, 2 or 3 gallon sprayer and always work from the bottom and spray upwards. Brown algae stains on boat bottoms magically disappear while spraying. In some cases there is little or no scrubbing. Boat bottoms become showroom clean. Don't work too hard. Spray away orange oxide stains on exterior surfaces. Again, always spray from the bottom upwards. In some areas Slimy Grimy will work overnight when applied on siding, roofs, shingles, etc. at dusk on a misty or damp night. Enhance the look and longevity of wood, stucco, brick, aluminum and all types of siding and shingles. White towels and clothing become white again with a little original Slimy Grimy in the wash (especially in areas where there is iron oxide in the water). Rust stains disappear to show the beauty of your environment.