sjholt wrote:
If you coach sits on regular ground and not on concrete or asphalt, the moisture comes up from the ground and gets on the chassis and this could be your rusting problem.
You might put a plastic tarp under the chassis to stop some of this.
I had a Vette that I wrecked and put into storage back east and didn't put any plastic under it and it has a very rusted chassis within 5 years when I came to pick it up. Sold it for junk.
HTH
I dont believe that for one second. Untreated metal left out will rust no matter what....dont have to be near saltwater or any such BS.