2 IN 1 DEGREASER Heavy Duty Degreaser & Aluminum Brightener PROCHOICE® 2 in 1 HEAVY DUTY DEGREASER / ALUMINUM BRIGHTENER is a fast-acting alkaline-based cleaner for aluminum. It acts fast and easily cuts through aluminum oxidation leaving a shiny and lustrous bare aluminum for that brand-new look. PROChoice® Aluminum Brightener is the professional choice for tough stains and grease. It should only be used on particular surfaces and should be handled by professionals. Dilution Guide: Aluminum â–º 1:5 Engine â–º 1:10