I also recommend the Turtle Wax ICE. I use the one that comes in a tin and you have to apply it with a pad. I thought I saw they have spray versions now.

 

This is what I use on my whole Jeep. puts a good protective coating on it.

 

Paint your flares with T-Line automotive trim paint. Eliminates the plastic probem forever and cleans up quick (including wax) Once they start to fade and look like a ten year old cherokee, you'll have to do it anyway. Plus they black up really nice.

 

x2 on the turtle wax ICE. I apply the paste with the supplied pad and then, per the hint in the directions, use their detailing spray lightly when wiping off the wax with a microfiber rag. They have recently come out with an interior cleaner/protectant. I bought a bottle to give it a try. I know almost everyone on here uses 303 by the 50gal drum, but if this stuff will clean too...I might switch.