Shatneyman when I applied mine initially I washed then clayed the car since we were just getting out of winter so I wanted the surface to be as contaminants free as possible and the results have been astounding silky smooth surfaces like F11 at a fraction of the price and does not disappear after 10 car washes which is not a big thing for slingshot but for subs/cars it is.
Currently the only part of the slingshot that has shine armor are the wheels since I am trying to finish the Lucas as well as other products that I bought before I switch everything to shine armor, the black plastic I might continue to use Lucas since I don't know how a "ceramic" would work for that.
The black plastic works with the F-11 so it should work with what you will be using