Abstract: A processing device comprises a base member with inner and outer concentric tubular shafts extending vertically upwards therefrom. There is means for rotating the shafts in opposite directions. A container mounted on the base is connectable to the outer shaft for rotation therewith. An impeller within the container is connected to the inner shaft for rotation therewith. There is a valve for controlling the flow of material through an aperture of the impeller member and an aperture of the inner shaft and downwardly through the inner shaft. A dispensing device comprises a distributing head with a fitting for connecting the device to a hose for supplying a paste-like substance under pressure, a spreading edge and a plurality of conduits extending from the fitting, through the distributing head and opening outwardly adjacent the spreading edge.