P2.2 Uses and dangers of static electricity- spray painting ~ the object being painted is negativley charged. the nozzle of the spray is connected to an electriity supply. The droplets of spray pick up a posotive charge as they come out. the posotive charged droplets repel from one another, so they spread causing a fine spray. Thus the paint droplets are attched.- A bonding line (metal wire ) is used to connect the aircraft to earth before it's refulled. thus discharging the aircraft so there will be no sparks.- when tankers deliver fuel, the hole used to fill underground is made of conducting material so there will be no spark.