Dual mode foaming spray gun with rotatable spray head

A spray gun, comprising:

• a mixing valve having a first inlet, a second inlet, a first outlet, a second outlet, and a means for switching outflow between the first outlet and the second outlet;
• a handle extending from a proximal end of the mixing valve, the handle including a means for coupling the first inlet to a pressurized fluid and a means for starting and stopping flow of the pressurized fluid;
• a barrel having a static end configured to engage the mixing valve, a rotatable end defining a spray port and a foam port, a rotatable seal joint fluidically connecting the static end to the rotatable end, a first channel fluidically coupling the first outlet to the spray port, and a second channel fluidically coupling the second outlet to the foam port, wherein the rotatable seal joint has a means for rotating the rotatable end relative to the static end while maintaining a fluidically sealed environment.