resurrectedz28

Long story short is i need to switch my drivers side door with a new one, but i really want to do the surface prep myself and then have someone spray it for me. Any tips, or sanding grit order would be greatly appreciated, as i really have no idea about what i am doing. I know I won't be able to do it perfectly, but the paint on the rest of the car isn't perfect so i won't mind too much. Thanks alot.