How do you remove those 2 blak plate things that are under the ttops when u remove them??? they have 3 screws in each and removed thscrews but i cant get h plat out do you jst have tu pull onit with like a screwdriver??? cause there is all rust under there that i need to remove. Also i have rust inside the carwhere the headliner covers, shold iremove the rust and just put some like rust preventive paint on it like POR 15???