Restoring a grill? repairs and paint?

Im curious as to how people go about repairing most of these plastic grills. My 72 grill is "almost" mint. The previous owner broke part of it, luckily it came off in one nice piece in a very workable area. Im just wondering what would be the best way to reattach it to make it appear as it was never broken. Id also like to paint my grill. Im curious as to how people have gone about masking them off, and what kind of paint to use. Im repainting a 72 grill and would like to get black and silvers that are close to factory, it doesent have to be "exact" as this is not a numbers matching crazy restoration car. i just want something rather close. any opinions, pictures or help is greatly appreciated.