With the fan on, air was sucked into my "booth", and the walls sucked in a little bit, restricting the space and movement, but I slipped by in my slippery stylish Tyvec outfit and had problems only when I did the doors. It was easy to drag the air line across previously painted areas when maneuvering in the tight space at the front of the garage, with a door flat on its horses and the plastic sheet sucking in. It was also easy, and just about impossible to keep from dripping sweat on some part of the car. But I got it done.