Over time, traffic and soils take their toll on the finish. Then two or more coats of finish are applied to restore the original shine of the floor. During the top scrub and re-coat process, the top, dirty layers of the floor finish are removed. Interim maintenance, commonly called top scrub and re-coat, is employed when routine maintenance no longer produces the desired appearance levels, and if further deterioration occurred, the floor would require stripping. Proper routine maintenance is required to maintain the desired appearance level of the floor and to extend the time between interim and restorative maintenance procedures. Soils penetrate the protective coating and cause the film to become rough, less slip resistant and less reflective. Maximum floor appearance is achieved when the floor coating is clean and smooth. A properly maintained floor will reduce costly restoration.