What is the method for touch-up painting a white car?

[VonRhett]

White car touch-up painting method is: 1. Thoroughly clean the surface to be repaired before painting; 2. Use alcohol to remove wax film, moisture, oil stains and rust from the area to be repaired to enhance paint adhesion; 3. Shake the touch-up pen thoroughly before use until you hear the marble rattling sound (shake at least 30 times); 4. Open the pen cap while holding the touch-up pen upright to prevent paint overflow (never open it horizontally); 5. For deeper scratches, apply repeatedly with the brush; 6. The touched-up area may appear slightly uneven after direct application - after the paint dries completely, use 2000-grit wet sandpaper to smooth it until the paint surface becomes flush with the surrounding area.