What is the operation method for car touch-up painting?
2 Answers
The operation method for car touch-up painting is: 1. Thoroughly clean the surface to be repaired before touching up; 2. Use alcohol to remove wax film, moisture, oil stains, and rust from the area to be repaired to enhance the adhesion of the paint film; 3. Shake the touch-up pen thoroughly before use, hearing the sound of the mixing ball for at least 30 shakes; 4. Open the cap of the touch-up pen in an upright position to avoid paint spillage; 5. For deeper scratches, apply repeatedly with a brush; 6. The touched-up area may appear uneven initially. After the paint film dries completely, use 2000-grit wet sandpaper to smooth it until the surface is level with the surrounding area.
I've been doing car repairs myself for many years, and painting requires attention to detail and sequence. First, thoroughly clean the damaged area with water and a neutral car wash detergent to remove stains, grease, or dust, then wipe it dry with a clean cloth to ensure no moisture remains. Next, start sanding—use 800-1200 grit sandpaper to gently rub the surface, removing old paint and rust marks, but avoid excessive force to prevent damaging the metal. After sanding, remove dust with a cloth or compressed air, then apply primer to prevent rust: spray a thin layer to cover the area and let it dry for about half an hour, ensuring the surface is smooth. The key is spraying the color paint—color matching must be precise. I recommend checking the vehicle's VIN code to buy the corresponding paint color. When spraying, hold the can about 20 cm away, press lightly, and apply several even layers with 5-minute drying intervals to avoid runs from excessive thickness. Finally, apply a clear coat for protection and wait for it to fully dry for 24 hours before polishing with a buffing cloth for a smooth finish. Perform the entire process in a well-ventilated area while wearing protective gear to avoid inhaling fumes. With patience, you can prevent color mismatch and bubbling issues.
