Vehicles and Physical Combat Spells Options

[Dashifen]

So, I have noticed in my games the susceptibility of vehicles to Powerbolt and Powerball. Even after Counterspelling, a successful high force physical combat spell can make any drivers day a lot worse. Thus, I was thinking about the concept of having a initiate mage quicken a mana barrier spell to the car. I've frequently used Mana Barrier as a spell to act as "extra" Counterspelling dice, but the books specifically says that targets that are targeted through the Mana Barrier receive extra resistance dice equal to the force of the spell. However, if you're targeting the vehicle itself, with a quickened Mana Barrier, do you all feel that the targeted vehicle would receive any special enhancement to its "defense." However, since vehicles can't resist the spell, the only thing I can think of is adding the Force of the spell to the vehicle's Armor for the purposes of spells only.

What do you guys think? Anyone have any other good defensive vehicle strategies vs. magic other than Counterspelling?