A system may include a portable spray device having a battery powered drive, a rotary atomizer driven by the battery powered drive, and a syringe configured to supply a liquid to the rotary atomizer, wherein the rotary atomizer is configured to rotate to atomize the liquid into a spray. A system may include a portable spray device having a barrel portion with a first syringe fluidly coupled to a spray head, and a handle portion coupled to the barrel portion via a break-action mechanism. The handle portion may include an actuator assembly configured to drive a first plunger in the first syringe.