PlastiDip is also a great way to go.
No need to sand down the fenders first. Just wash like you do when you give your jeep a wash, let dry, wipe with isopropyl alcohol, then spray. Dries flexible so you'll never have chips or cracks and if you ever want to go back to your original flares you just peel it off and no damage has been done : thumb:
Comes on black and white aerosol cans, and red, yellow, white, blue, and black in liquid form.
Look up plasti dip wheels on WF and you'll get an idea of how it works