the vinyl bra is one of the best investment for ones car, it saves your car from rock chip and also a great reselling option for a car. 3M seems to be the most popular one, they warrant for them is up to 5 yrs, some non-3m brands are warranted even up to 7 years. They dont fade the car color too btw.
I have been shopping for quotes from local area installers, and I have bids from $1095, $750, and finally found one that will do it for $650. The install kit comprised of the front hood, upper/lower bumper, headlight/lower headlight panel, the front side of the quarter panel by the headlights. The vendor Im going with will also cover the side mirrors and door edge guard, maybe a small portion of the mud panel area.
If you would like to attempt this on your own, buy the kit, get a sqeegie, knife, spray bottle and maybe a pin to take air bubbles, also hair dryer.
1. fill the spray bottle half water, half alcohol and bottle cap of Johnson baby shampoo.
2. stripped wax from the area to cover, by applying alcohol, and let dry.
3. wet/saturate the area with the mix solution.
4. peel off the backing from the vinyl bra and wet the adhesive part with your mix solution.
5. affix the kit to the car area surface and work it in, sqeegie air out, once you feel you got it all out, use hair dryer to dry it. (work with small area first)
6. large kit would need 2 people to work it.
If you decide to just have it done I got some local vendors that have good recommendations from M3 forum mbrs.
Also, Bavarian(AJ) has this installed on his 330i, maybe you can PM him.
Good luck and have fun on your M driving class this week, take photos, and bring gifts back
Later Dean!