Norglass Metal-Etch Cleaner 1LA specifically designed metal conditioner for pre treating bare aluminium, galvanised iron and non ferrous alloys such as brass, copper and bronze. Easy to use. Brush on and wash off. The thixotropic gel is designed to hold the product on vertical surfaces. Stirring or shaking the contents converts Metal Etch into a liquid for hard to reach areas. This product is also an excellent rust remover on steel.