When you airbrush the air bag cover, you are betting teh bag will never be deplyed, because of the cost.
The alternative is, picking out some graphics, and working with PurpleJalopy.com to do it in peel off vinyl. The work is veryu high quality, and individual lines, not a large piece of clear plastiv with graphics on it.
See soonercruiser's air bag graphic below....
Custom Air Bag Graphic picture by SoonerCruiser_photos - Photobucket