from my rudimentary understanding the closer to the great lakes you get the worse it gets, because there is always a fine mist of freeze in the air since the lakes don't freeze over and continue to evaporate the large bodies of waterRusts never rests around here. I've never been to iowa. I recently bought a trailer from aluma that manufacture's them there....its made of mostly aluminum except for the torsion axle, and wheels. Been as far west as michigan, its gets rusty there to.
Couldn't say...only been there in mid summer to run their national enduro the jack pine. They have nasty woods just like here in the northeast.from my rudimentary understanding the closer to the great lakes you get the worse it gets, because there is always a fine mist of freeze in the air since the lakes don't freeze over and continue to evaporate the large bodies of water
All in all that subframe was not caked in rust, just a little around the edges that I could tellDon't forget to do the insides.