I bought your product last summer for my rv (5 gallond). Excellent product. My new project is a 25×8 step van. It's an aluminum roof that has been painted and cleat coated. The clear coat is peeling off so I'm sanding it off. Along roof edges of van, I'm going all the way down to bare aluminum because I am having the sides of vehicle vinyl wrapped to give top edges excellent adhesion. So the part I want to wrap will be part vinyl (about 1 inch) and some bare aluminum and mostly sanded painted roof surface. What products should I order from you to accomplish this? This is a food truck project.