Make sure you clean the mill scale off of it first. Even with really good primer and paint, it will start to peel if you don't clean the metal really good.
I always close the doors and wet my garage floor so I don't kick up dust.
So for those of you that have rattle canned a Crawler Conceptz body mounted carrier, or the similar, what is the best way to hang the carrier to paint it? I was think just some wire through the mounting holes on the right side, that way I don't have to wait for one side to dry and then flip it over and paint the other and so on. But hanging it presents the problem of paint dripping and creating bubbles if I put too thick of a coat down...