I have a bra, bro...
I have a Le Bra on my pearl white '96 bird. I only use the top half of the mask. It's really your own call, based on the condition of your paint. I drive a LOT on the freeway in southern California, and because of all the debris kicked up on our freeways, the bra saves me from a lot of chips.
A word of advice, though. Regardless of the condition of your hood, if you do go the bra route, make sure you wax and buff the hood prior to attaching the bra. And use the paste variety, not the spray type you find in a quick detailer bottle. This will provide additional protection against scrathes from the bra.
And when you take off the bra for cleaning, MAKE SURE you clean the reverse side (the side that lies against the paint). You wouldn't believe the dust and crud that's collected in there that will scratch the paint when re-attaching the bra to your car. Good luck.