My poor Jeep was lent to my uncle for the past couple of years and now im getting it back and the damn door is about to come off. The hinge is maaaaadddddd rusty. You can't tell in the pic cuz i sprayed it with ruststop so it wouldnt spread. same thing with the rocker. i figure i can just patch weld that or whatever but how can i weld my door back on. plz help

Also my jeep's front end shakes when i hit like 60...anybody know what it could be?