I think this is a wonderfully simple idea. Bulldog specifically states it works on polypropylene, which is what our cladding is made of.

Lightly sand the surface. Clean really well with the remover or Acetone (I would imagine), clean again, apply Bulldog then the paint!

It's enough to actually make me wanna try it. I am SICK AND TIRED of putting back to black on every weekend. It's the only thing that keeps me from just going to a car wash and having someone else do it. cause they use crap like turtlewax. And in Texas heat it dries out in days.