Clear Bra is great--had it on my Jet Black e53 for 9 years now (first time for 5 years, a lady hit me, and now for 4 years).

But I would never do the full hood or go crazy on all parts of the car--trust me, it looks super clear now but if you keep it more than 5 years it just doesn't look the same. Meaning, the regular paint and the Clear Bra have a little different texture look to it plus the paint looks great when waxed versus if you have the whole hood protected you can't do that. I paid probably $400, custom kit, which covered the front side of the front bumper, fenders and hood (about 12-18 inches in) and front of side mirrors.