Skid Row Joe wrote:
I have rust on my unit's frame from just visiting a few days most Winters Up North. I don't know when it becomes a problem though. Same with my Mercedes-Benz autos. A couple weeks most every Winter up North, and bits of rust show wherever bare metal is. It's part of the North Country Winters.
Surface rust is going to happen. Having lived in upstate New York I have seen firsthand what salted roads can and will
do to your vehicles.
I like to take a creeper and go underneath my rig and i do it on a regular basis. You may want to try that and poke
around at the rust and see what is going on.
As you describe your adventures, my guess is you have just some surface rust. As was said, take a hammer and tap on
some metal, if the rust falls off you may have some issues.