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How do you prepare aluminium for a RAPTOR application?

Clean the aluminium with a wax and grease remover and sand with P180 grit sandpaper. Apply one to two coats of ACID#8 Acid Etch Primer (ACID/AL) and use GRIP#4 Universal Adhesion Promoter (GRIP/AL) for hard to reach areas. Allow to dry 20 minutes before applying RAPTOR.