Somehow I got roped into doing some collision work for a friend. She wants me to shoot a new fender and plastic front bumper for her daughters Civic. It is the generic Silver they have used for years. I have a new can of adhesion promoter on the shelf but I also have a lot of white epoxy. I am thinking of just shooting some thinned white epoxy then base then UC. Is that reasonable approach? Should I use the adhesion promoter on the plastic bumper first?