An apparatus (10) for spraying powder coating material includes a rotatable turret (14) which moves articles (12) to and from a work station (16). A powder spray gun (18) is operable to spray an annular pattern onto each of the articles (12) in turn while the article (12) is at the work station (16). The powder flows through the spray gun (18) as a series of pulses. An excess powder collector draws a flow of powder away from the work station (16). The powder spray gun (18) is mounted on a three axis adjustment assembly to enable the powder spray gun nozzle (52) to be accurately positioned relative to an article (12) at the work station (16).