While I was in the Army CLP was standard government issue. Not much translates exactly the same between military and civilian life, so CLP always gives me that nostalgic feeling. There might be something better out there for armor (Fluid Film?) but CLP works great for cleaning my swords, firearms and armor too, plus it's it's a cleaner, a lubricant and a penetrating preservative all in one, and it's cheap and can be found everywhere. So logistically it's a no-brainer.
Thanks for the link to the rust test Scott, it was interesting.