(1) before grinding, dialogue billet inspection, for degumming, bubbling, scratches, touch products processing;
(2) white base shall be smooth, nailhole, gap to be filled;
(3) primer to spray evenly, and check the presence of degumming, bubbling, after being dry polishing.
(4) when the spray paint can not have particles, sagging, peeling, luster in accordance with customer requirements;