 the protectant, because what you're going to do is you're going to put another coat of protectant on it. And if you have a really sunny location, you can do that maybe every two to three years and stay ahead of it. You don't even really have to take the door off. You can if you want, but you don't really have to. And scuff that up with that wet, dry 600-grit sandpaper or a two-watt steel wool.