I like painted bumpers, but I would not consider painting the stock bumper on a jeep. There is to much flex with the material and I would think you would have cracking problems in short order. The finish is also not the same as the body so you may end up with a different look. Front bumpers take a good amount of abouse from Bugs, dirt and small stones hitting at 65 MPH and such. You want t good durable quality paint job with a thick clear coat if you would like it to last.
Here are the pics stroh may be talking about.