I've had a few people ask me about this, so I figured I'd go ahead and post the info.
I use duplicolor spray on bedliner on everything.
Doing the hinges is an easy afternoon job.
Use a good torx socket and break the hinge to door bolts loose with the doors still on the jeep, that way you can lean into the socket. Those bolts are pretty darn tight.
Once they break loose, then take the door off and lie it down somewhere to finish removing them.
Also, you may want to take a razor blade and go around where the hinge meets the door just to make sure that when they pop off, they don't take any paint with them.
I've used a blade on some and not on others and never had any problems either way, but it's easy insurance.
Once you have the hinges off the doors, mark where they came from on the back of the hinge with a sharpie - the top and bottom hinges are slightly different.
The jeep sides of the hinges are easy, just take the bolts out and they come right off.
The good hinges are a little bit of a pain, you have the 4 torx bolts to the hood, then the 4 bolts from the windshield side of the hinges. It looks like they bolt through from under the hood, but the bolts actually come from the windshield side, if you have big hands, you may need to take the 4 torx bolts and loosen the cowl to get to them.
Once you have everything off, use a scotchbrite pad in a cordless drill to scuff everything up, be careful on the jeep side parts as there is a little plastic bushing that sticks up for the door to ride on - dont scotchbrite the plastic 'washer' on top too bad.
You don't need to go nuts, just scuff it all up and take the shine off everything.
wipe everything down really good with some thinner to get all the dust off from the scotchbrite then mask off the hinge pins and you're ready to spray.
Don't forget to scuff n paint the bolt heads - poking the bolts through a piece of cardboard makes it easy to work with them.
I did a few medium coats, about 5 or 10 minutes apart.
In a dry climate, let everything dry 1-2 hours and it should be fine.
You WILL scrape up the bolts on the jeep side of the hinges with the wrench when you reinstall them, but its easy to touch them up,
Just use the old paint lines on the body and on the doors to get everything back exactly where it came off and you won't have any door alignment problems.
On the hood, just make sure the hood is setting where it goes and is nice and straight, then tighten the hood torx bolts first, then the jeep side bolts.
probably sounds complicated, but thats about as detailed of instructions as I can give.
It's an easy afternoon job.
The great thing about the bedliner is you really cant screw it up because if the texture, its really to touch it up if you need to.
Also a quick note on texture, you can kind of control how rough the bedliner texture is, if you hold the can farther away while spraying and go a little lighter with the final coats, you'll get a rougher texture, closer and lay it on a little thicker and you'll get more of an orange peel look.
Now that you know how to do the hinges, you'll be ready when you decide to do the grill or wheels