Abstract: A transportable body (10) suitable for spraying vehicles comprising a main body having a spray compartment (12) with a floor, a ceiling, opposed side walls (16, 18), and a vehicle entry door (20) an upper air inlet plenum for introducing air through the ceiling and an air exhaust in the floor wherein the air inlet and air exhaust are configured to provide a downdraft ventilation system the opposed side walls of the spray compartment are outwardly moveable from a transport position in which the main body can be loaded onto a transporter and a spray position a utility compartment (14) housing an air inlet handling unit (24) with an air inlet fan for supplying air to the air inlet and an air exhaust handling unit (26) with an air exhaust fan for drawing exhaust air from the air exhaust in the floor, the compartments being arranged end to end and a wall separating the compartments.