In your climate, I'd do a frame off preservation.
Sand down frame and paint with POR-15. And I'd rubber coat or POR-15 the under side of the body. And rubber line the interior.
My environment is mostly wet, and my cab is starting to rust out around the windshield!!
![Crying Rivers :rivers:](https://board.marlincrawler.com/Smileys/marlin/rivers.gif)
And it seems water likes to seep in from almost every spot imaginable. I wish I lived in a drier climate. Oh well, if the body rusts off, then buggy time it is, with rain gear and goggles.
![Cheese! :cheese:](https://board.marlincrawler.com/Smileys/marlin/cheese.gif)