If i could offer suggestion of POR15I don't think ours is near a critical stage, but, this '09 appears to have lived a harder life than the one I drive. I am keeping a close eye on that rear suspension though. They looked OK last year when I replaced the struts (as I had to unbolt that part from the chassis) but, rust can happen quickly once it starts.
Im my younger days built a number of offroad trucks - 1987 & 1988.5 Samurais, 1979 wide track cherokee with the AMC 360 and Dana 44's, 1988 Cherokee and POR15 would stop rust dead in its tracks.
Knock off all the loose stuff and paint directly on the remaining metal
As you can image vehicles from this timeline has severe rust and this saved a number of frames which were on the way out