Clear bra's are not a 100% solution although it does prevent a lot of chips. Probably the best solution.
I have a clear bra and there are 3 small areas where the debris ripped through the clear bra. Again, when you follow a car with slicks and they drop a tire on dirt your car gets blasted with rocks and pebbles.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red