I have a fifth wheel that lives full time near the ocean and beach front when I'm there. I rinse it off at least once a month and have it waxed every three months. I'm now using a dry lubrication spray on the slides. What else can I do to keep it from rusting away? Any other ideas on what in general I should be doing? This trailer is a big step up from my last trailer, a 1971 fireball.