Whenever I come home from my Ocean front, 2 week trip to Myrtle Beach the FIRST thing I do is use my pressure washer to get ALL salt residue off. I even go onto the roof and hit the AC's and their fins..
I lay under and hit the entire under carriage, rotors, calipers, ect....
One year while in MB, I was next to a 1 year old DRV... The owner had it kept in their ( MBTP ) storage yard a little bit up the road and has it delivered to site when needed.
Every piece of metal that could rust, DID and looked horrible.... the owner was looking into solutions...