To avoid corrosion, mix solution in a plastic pail or  other suitable container.  Dilute aluminum brightener concentrate with 50 - 100 parts of water to one part aluminum brightener concentrate.  Apply aluminum brightener solution to surface to be cleaned with brush or sprayer, working in small sections from the bottom upward to avoid streaking.  Allow aluminum brightener solution to remain on surface for 3 to 5 minutes.  Do not allow surface to dry out during application.  Agitate surface with a long handle brush to remove heavy soils. Then rinse with clear water.  Avoid contact with glass or porcelain surfaces as product will etch.  If contact should occur, rinse immediately with water.