Spray tire shine on the tires and make sure the wheel itself is really clean (make sure no tire shine is on the wheels).

Spray the plasti-dip thin coat, by thin coat all over the wheel and since you have tire shine on the tires you don't have to worry

When your done (make sure its dry) just take a razor blade and trim around the wheel and then peel the remainder off the tires (should come right off)