We are repainting the garage doors. They are roll up doors with square raised panels on each section. They are wood with masonite center panels. As I prep for paint, should I caulk the seams between the flat panels and the rails/stiles? I know that ideally they should "float," but since they are out in the weather, I'm inclined to want to seal moisture out. I can't find any evidence that there was caulk in the seams, and I believe these are original to the house (1969).