Bro, you parked it under a tree for the whole winter? On GRASS?
Aside from the tons of birdShyt on your car; for future reference, dont do that ever again. Moisture from the ground (precipitation) will rise into your Car, and do more damage than Just rust. This moisture will seep into your Fuse Box's and corrode the gromits and wires.
Grass is the worst spot to park a car. Im just looking out for you bro.
my Aunts 2000LS bit the dust because although she parked it for two years on her driveway, her neighbour across the street who would plow her drive way, would shove the snow toward her LS (which was parked in a corner). This LS being encapsulated by snow, soon rusted within the two years, so badly that the frame was eaten through and had wholes the size of baseballs.
The snow had melted and the moisture rusted everything out. Including the gromits in the fuse box.