hmm if im not mistaken.. that piece by the tail light can be replaced right??? and i dont think its more then 80 bux for the whole piece... dont have them just fiberglass that spot where the rust is at cuz it'll come right back out and be even worse... to repair it, you'd have to get that piece cut and they have to do some weld work.. and about the rusty bolts that are on your hatch/windshield.. just get some fine sand paper and sand off the rust and spray some primer on it.. they sell diff colors.. u can either color match your car or just do it black.. but make sure you cover it all so the rust wont come back

hope that helps