I stripped the very front down to tidy some things up, found some rust in the area inside the red square in the picture (not my picture, just one from google showing the area). I am not sure what you call this section in front of the radiator support, but I presume it is meant to be quite sturdy as the bumper etc bolts there, and it's double thick like a 'tube'. Both inner and outer layers are rusting, so I am guessing the inside is very rusty.
Does this area rust out often, can you get rust repair sections (or good sections off wrecks)?