Another problem associated with removal of excess paint spray from plant production paint spray booths is the fact that some manufacturers use high solids enamel paint compositions that retain their "live", sticky paint characteristics as the excess paint is carried down in the air/water disposal system. These high-solids enamel paints continue to be sticky on the grate-block surfaces, and are not "deadened" by additives to paint spray booth disposal water systems. Such enamel paints accumulate even more rapidly on the grate floors than some of the older acrylic lacquer paints which dry faster. Even more frequent cleaning is thus required.