This is also done in auto racing, particularly endurance racing where you might pick up 4+ hours of bugs and debris on the windshield over a driver stint. The

This is also done in auto racing, particularly endurance racing where you might pick up 4+ hours of bugs and debris on the windshield over a driver stint. The windshield has a stack of huge stickers on it that get torn away by the pit crew during stops. Apparently you can get stacks up to about 20 layers. Seems like a reasonable possibility for messy AR applications.