I am wondering what you guys do if you are taking the loader off long term. How do you cover the entire rams so that there is no chrome exposed? I will be taking it off for most of the winter and it will be stored outside.
Once it's off the tractor I'd just cover it with a blue tarp. You can put bungees in the grommets to pull it tight in a couple of places, and weight it down with bricks or wood blocks or something to keep it wind resistant.
Ironically, I put the loader on all winter with a rear end snowblower, and that's the snow removal configuration.
Try a can of Fluid Film. I think Oreilly has it now. But anything coating the exposed shaft has to help.
I bought a backhoe 20 years ago that had been setting out side probably 5 years then. I cleaned the little pick marks off with some emery paper and been using it since. Never any trouble. Never inside. I think the quality of the shaft determines the damage done.
I use fluid film undercoating that works well. A good friend picks me up a 5 gallon pail of it when I need it and I have a spray gun to apply it with. As the commercial says, I put that chit on everything. . Just don't use WD40, your wasting your time and money it's not meant for that. A spray undercoating like Krown or Rust Check makes for an easy clean up in the spring.