Previously named Drifter is an acid-based cleaner incorporating a biodegradable surfactant which cleans & revives fibreglass gelcoat, painted timber surfaces and steelwork. Ideal for de-yellowing gelcoats/fibreglass, its phosphoric acid formula is most effective at removing rust stains, converting rust and inhibiting its reformation. Used at the recommended concentrations it will not cause streaking or effect painted surfaces providing it is washed off before drying.