10/4 I'll pick up some PPG wax n grease remover, it doesn't leave any residue at all unlike soap and water.  Perhaps a light scuffing with some medium 3M sanding pads will help give it some tooth.   I had no idea the bodies were lexan, I thought they were polyethylene or polyacrylic not a polycarbonate.  It definitely helps to know what kind of substrate you're working with lol.