McKee's 37 Coating Prep Auto Wash is the first step in prepping a vehicle for application of a ceramic coating. This high-foaming wash helps break down and remove road film, previously applied waxes, and silicone oils. McKee's 37 Coating Prep Auto Wash does not leave an unwanted film on the surface like a dish detergent would! McKee's 37 Coating Prep Auto Wash ensures the paint is as clean as possible before you proceed to the claying and polishing step. McKee's 37 Coating Prep Auto Wash can be used in a bucket or foam gun.