Air Brush Inks Ventilation - A really neat trick, especially in an inclosed make-up trailer, is to take a 2 ft.X 2 ft. box fan and tape a 2 ft. X 2 ft. A/C filter over the exhaust side of the fan. Place the fan behind the area to be sprayed so it draws the overspray into the filter. This is especially effective around the face as well as on other areas of the body so the overspray is "sucked up" and the actor is not affected.