Pre-clean the surface to be treated to remove grease and residue.

Rust: Apply neat with a brush, sponge, or spray gun. Leave for 10 minutes and rinse with water.

Limescale and scale: Dilute 5-15% in water (preferably hot). Leave for 15-60 minutes and rinse. Ideal for boats, decks, engines, pipes, boilers, and tanks.