Abstract: Apparatus for powder coating the inside of can bodies, either along a strip or completely, comprises a spray head having an inlet opening fed through a gun with a powder-air mixture and an exit opening located so as to deliver the powder-air stream transversely to the gun axis onto the can body. The exit opening is either a slot-type nozzle for applying a strip, or an annular opening for a complete coating of the can. So as to apply the coating in a precisely limited form without rebound, insert baffles in the form of rods are fixed in the spray head passage which expands between the entry and exit openings to slow down, distribute and orient the powder-air stream towards the exit opening. A deflector wall is located at the end of the passage to deflect the powder-air stream towards the exit opening.