yeah i painted my back bumper (white).... i just sanded it so everything was smooth then primed it and then painted it and threw some clear over the top...
to be honest its not the best job but when the car eventually gets a full respray ill do some bars that are in better condition, i just wanted it to look better then it was...
as for the paint its just normal acrylic stuff, nothing fancy...
BTW for the badges, do what i done, heat them up with a heat gun (dont get to close and dont leave it in one spot) and just keep going over it for about a minute then rip them off