I would repair the rear spring/frame area, and then NOT drive it in the winter. Colorado uses lots of salt.
All grease-type products will make refinishing difficult later, but not impossible. If it's a garage queen, it won't rust enough to matter -just park it. If you are parking it outside or driving it in wet weather., I would drown all the exterior areas with Fluid Film and put a less-stinky grease inside all the doors. I think wire-wheeling and priming is a lot of extra work and won't do as much as entombing areas in petroleum products.
All grease-type products will make refinishing difficult later, but not impossible. If it's a garage queen, it won't rust enough to matter -just park it. If you are parking it outside or driving it in wet weather., I would drown all the exterior areas with Fluid Film and put a less-stinky grease inside all the doors. I think wire-wheeling and priming is a lot of extra work and won't do as much as entombing areas in petroleum products.