Abstract: A paint spray booth for painting articles is disclosed having a liquid wash scrubber beneath an upper chamber for removing the overspray paint particles from the air by intermixing the paint latent air with a liquid such as water. The scrubber forms a substantially horizontal water and air flow path to reduce the vertical height of the scrubber and therefore reduce the vertical height of the overall spray booth. The scrubber forms a trough extending longitudinally through the booth having a liquid flow exit from the bottom of the trough laterally from the bottom of the trough. Downstream from the trough, a baffle blocks the flow of the liquid forming a liquid trap to create turbulence in the liquid flowing through the scrubber to intermix the liquid with the paint latent air.