Have the same X as you and in the same boat as far as the bumpers go. I am doing something with them with either plastidip or covering with bed liner. My X is white and would be going with black on the bumpers and flares. Just have not decided which route I'm going to go as of yet.
I have a hard time picturing what the end result would look like since it's such a big part being coated.
Here's a link to someone who plastdipped the wheels and used Krylon Fusion on the bumpers/flares, silver car but close enough for an example. It looks pretty good but Krylon IS permanent.
https://www.explorerforum.com/forums/showthread.php?t=375952
I think i'm going to use plastdip on the bumper before anything permanent incase I don't like it.
New shocks/struts, brakes/rotors, and a few suspension components will be arriving next week so i'll probably tackle at least the rims while the wheels are off.
Also having a hard time deciding on what to do with the calipers, I kind of want to go red

But also feel that may be a bit goofy on the exp. At any rate it isn't looking too pretty now, and i'll at least go over it with some black rust-oleum.
I've seen a few newer white Jeeps with black rim/red caliper that look really nice, but they are also a bit sportier looking SUV.
Anywhoo if you're interested in the end result I'd be more than happy to take a few pictures as I progress, like I said won't be til next week.
Also need to figure out how to get the roof rack bars and nerf/stepping bars back to black. A bit of rust on the stepping bars, and the paint is peeling in some spots showing the aluminum(?) on the roof rack