Some early 1960's small skirtless hovercraft experimented with bristles in lieu of a flexible rubberize cloth for a skirt.
As I understand it they allowed almost all of the air pressure/air flow to escape and were worthless.
A simple test to verify would be to take a broom to the gas station and shoot compressed air though it. You will find out soon enough first hand.
EDIT: Experiment closer to real life.
Have your wife drive, take a whisk broom with you out on the highway, roll down the window and feel how much air gets through.
Only a loving wife will understand your madness.
