"I wire wheeled the entire tub, used the three stage Chassis kit Chassis Paint Kit - KBS All-In-One Chassis Kit - KBS Coatings - prewash, metal prep, then applied paint with a brush/roller ... I painted the chassis, tub (inside & out), fenders, hood, bumpers and windshield frame. The main thing with this type of paint is to do ALL of the prep work, however painstaking it may be, and READ the instructions twice before starting. (That advice is for any of the rust preventive sealer paints.)"
Find out more about the All-In-One Chassis Coater Kit here: https://www.kbs-coatings.com/chassis-paint-kit.html