Use Monstaliner, Its a DIY roll on (or you can spray it on). Its very smooth, but has a very nice texture to it. You can get it in almost any color imaginable, and it comes in a Jeep Tub Kit!!
Its not gritty at all, so its easy to wipe down. will never chalk or fade.
I'm so glad I chose that over any other brand! From one jeeper to another!