just about everyone I know who takes the doors off never puts the nuts back on... I only keep them and put em back on around now, in the winter, but in the summer the nuts on the doors are never there. Also the more you put the nuts on and off the more paint youre giong to strip on them, you cant help it. But one trick ive learned to keep the body in good shape was to take a rag and put it between the nut and the body while you are slowly wrenching the nuts off, this wayif you slip you wont have scratches. About every other time I take the doors off I spray some WD-40 in the holes and on the pins. Not only will it help to save rust, etc, but itll save your back cause the doors will just pop right out.