the only one i would check is the fuel line if u clean it off with wire brush / or sand paper. if it is surface only you have nothing to worry about. if deep pits i would replace it ,,it has 50 to 60 psi on it most of the time even when car is off fuel pressure does not go to 0
the other stuff you could clean off put some anti corrosion spray on them.,,Oh again if they are rusted bad replace