The paint overspray is captured by a wall of water curtain or scrubbed by water before exhaust to the atmosphere. The water curtain is achieved by a pump or without pump. These wet paint booths are ideal for large production rates and for paints with low solid content. Provided with suitable exhaust blower and ideal for continous production lines. A tank is provided for the water and this can be located below or above ground level. Suitable filters are provided at the intake of the water circulation pump. Drainage provisions are also given for draining and cleaning the tank. The tank is protected from corrosion by frp lining. All water contact points are in g.i or s.s construction for long life.