Water polishing makes the body perfectly smooth to prevent tiny irregularities in paint work. Robots that perform this task are trained to mimic strokes and movements of expert craftsmen.
Among the painting processes this water polishing stage, which happens immediately before painting, is one of the most important. This unique process involves the body of the car being polished while water is simultaneously poured on. Only highly skilled craftsmen know the perfect movement for the ultimate surface. So, the robots that perform this task are trained to mimic strokes and movement of craftsmen. Water polishing prevents tiny irregularities in the paint work. The result is the beautiful shine, luster and depth of color that you see on a Lexus body.