Repairing and Finishing Technology and Techniques of Automobile Complete Vehicle

When the body coating is lost light, discoloration, and even the coating cracking, partial loss; vehicle overhaul after refurbishment coating or vehicle to change the coating, the need for full vehicle repair, also known as full swimsuit.

The vehicle refinishing coating is equipped with two types of body paint: white paint and top paint. The car body is painted white, and all the old paint of the car body is removed to expose the metal substrate. If the underlying coating is intact and only the topcoat is aged (discolored, lost light, chalking, etc.), the new topcoat can be sprayed only after polishing the damaged topcoat, as long as the topcoat is refurbished and the coating is applied. The installation process is simple, high work efficiency, and low cost.

(1) Wash the car, check the coating condition of the car being repaired, and formulate the corresponding repair coating process and operating procedures.

(2) Surface treatment before primer application. Remove the old coating; remove rust, smooth the surface, especially the surface repaired by the sheet metal work to remove oil and dust; spray a thin layer of phosphating primer, and if necessary, perform phosphating treatment.

(3) Primer. Brushing and spraying self-drying synthetic resin primer, applying a dry oily putty on the surface of the sheet metal correction area and the concave and convex surface, polishing the putty layer, repetitively scraping the putty and grinding, generally need to be repeated 2 or 3 times, the last time wet sanding with water sandpaper , Blow and wipe the dust and moisture, cover the glass window or the parts that do not need to be painted with a protective cover or paper.

(4) Spray intermediate coating. Spray a coat, local repair putty, eliminate sand eyes, sandpaper marks, dry with 300 # ~ 400 # water sand paper grinding, blowing, wipe clean dirt and moisture.

(5) Preparation before painting. Wipe the oily surface of the painted surface with a rag of industrial gasoline; mix the paint, adjust the viscosity, and filter with a mesh cloth of 120 mesh or more.

(6) Spray paint. Spray paint, dry or forced dry at 60 degrees or less; after the coating is dry, remove the protective cover or paper; when the coating needs to be polished, polish it with polishing slurry or polishing wax; check the coating quality.

The above is the process and operation procedure for the white coating of the vehicle body. If the topcoat is used for refurbishing the coating, the surface treatment, primer coating, and other processing procedures before applying the primer may be omitted.