What is the method for vehicle spray painting?

[SanEli]

Vehicle spray painting method is as follows: 1. Clean the car thoroughly; 2. If the car surface is too smooth, use 600-grit sandpaper to sand it until a rough texture is achieved, which facilitates paint adhesion and prevents peeling; 3. When spraying, maintain a distance of about 20 cm from the car surface, press the nozzle and spray evenly, multiple coats will yield better results; 4. For multiple coats, ensure an interval of at least 10 minutes between each spray to allow the paint to dry and prevent sagging; 5. If sagging occurs, wait for it to dry, then use 600-grit sandpaper to sand it smooth, and spray from a distance to cover; 6. After the paint is completely dry, apply a layer of clear coat to enhance gloss, protect the paint surface, and increase durability.

[MacElizabeth]

The painting process must be done step by step. First, thoroughly sand the area to be painted on the car body until smooth, especially where there is rust or blistering on the old paint, which must be completely removed. Then, carefully protect areas that don't need painting, such as lights and rubber seals, using newspaper and tape. After sanding, it's best to apply a layer of epoxy primer to the metal parts to prevent rust. Once dry, use body filler to level any dents, and after the filler dries completely, wet sand it again until smooth. The actual painting is done in three steps: first, apply a primer to enhance adhesion, then spray 2-3 coats of color paint to ensure even color, and finally, apply a clear coat for shine, color enhancement, and protection. Nowadays, many repair shops use water-based paint, which is eco-friendly and odorless. After painting, the car must be placed in a paint booth and baked at around 60 degrees Celsius for half an hour to fully harden. Remember to move the spray gun at a steady speed, maintaining a distance of about 20 cm during painting—too close will cause runs, and too far will result in a sandy texture, affecting the finish.

[DelEleanor]

The most crucial aspect of car painting is the environment. It must be done in a sealed, dust-free paint booth, otherwise airborne dust particles can stick to the paint and create pockmarks. Nowadays, water-based paints require special hardeners and must be used within two hours after mixing in the correct ratio. For a full car repaint, small parts like door handles and emblems need to be removed to ensure even coverage, while spot repairs require a blending technique—gradually thinning the new paint at the transition area between old and new to avoid visible lines. Post-painting inspection is critical: walk around the car twice in natural light to check for color mismatch, and the painted surface should feel as smooth as glass when touched. Finally, remember that any color change must be registered with the DMV within ten days after painting.

[McAaron]

For DIY touch-up painting, first prepare a touch-up pen kit. Upon discovering minor scratches, clean the damaged area with an alcohol-dampened cloth. For deeper scratches, use the included sandpaper to sand vertically. Shake the touch-up pen well and apply thin coats like nail polish—applying too thickly may cause runs or drips. Allow five minutes between each layer; three to five layers should cover the scratch. When the paint is 80% dry, use polishing compound to blend the edges in circular motions. Underbody coating spray is a separate process: the car must be lifted, wheel liners removed, and the underbody cleaned of dirt before applying three coats, focusing on rust-prone areas like wheel arches and around the exhaust pipe.

[CameronLee]

The quality of paintwork largely depends on color mixing. Modern computerized color matching devices can accurately identify original paint formulas, but metallic paints still rely on the technician's experience. A mere 5-degree difference in the reflection angle of mica flakes in pearl white paint under sunlight can cause color deviation, so color mixing must be done in a standard light booth with color charts. Orange peel texture is a common issue when repairing paint surfaces, requiring wet sanding with 2000-grit sandpaper followed by polishing to a mirror finish. I often remind car owners not to rush into washing or waxing freshly painted cars—clear coat takes a full month to cure completely, and wax applied during this period can seep into the paint, causing cloudy spots. Paint protection film is more hassle-free than repainting—premium TPU films can last five years, and damaged sections can simply be removed and reapplied after minor scrapes.

[CalebMarie]

When repairing collision paintwork, pay attention to the quality of steel panel restoration. Areas that have undergone sheet metal work must be leveled to an error of less than 1mm, otherwise the curved surface reflection will reveal unevenness after painting. Before painting plastic bumpers, use degreaser to remove surface release agents, then apply PP primer to enhance adhesion. When mixing metallic paint, aluminum powder settles quickly, so shake the spray gun again after each panel is painted. The popular three-layer pearl paint for luxury cars now requires four spray applications: electrophoretic primer, color coat, pearl layer, and finally clear coat, with each layer baked to set. Avoid highway driving for 7 days after painting, as small stone impacts can easily cause the not-fully-cured paint to chip.