Putty spray machines aren't limited to just one type of surface. Their versatility allows them to be used on a variety of materials, from drywall and plaster to concrete and cement. No matter the texture or condition of the wall, the machine adapts and sprays putty evenly, filling in cracks, dents, and imperfections along the way. This versatility makes it an essential tool for constr... http://mayoworld.com/airless-putty-spray-machine-13151