Is the entire surface scraped off for car paint touch-up?

[StMaddox]

Car paint touch-up involves scraping off the entire paint surface. Below are relevant details about paint touch-up: 1. Process: Determine the repair scope - Assess the damage extent - Implement construction protection - Base layer treatment - Masking and degreasing - Spraying color paint - Spraying clear coat - Feather edge treatment - Baking - Sanding and polishing. 2. Quick repair precautions: Primer - The base material must be completely dry before spraying the clear coat; otherwise, paint surface gloss loss may occur. Color paint - Quick repairs must use single-component color paint. Clear coat - The spraying air pressure should not be too high (2-2.5KPa). Each layer should rest for 1-2 minutes, depending on the surrounding temperature during spraying. Lower temperatures require longer resting times, while higher temperatures allow for shorter resting times. The spraying thickness should be 1.5-2 layers, not too thick, otherwise drying will be difficult. After spraying the clear coat, it must rest for 5 minutes before baking. Baking and sanding - Use P1500-P2000 beauty sandpaper to sand dust spots and fully sand to a matte finish (dry sanding equipment is recommended; if wet sanding, use more water to prevent grit from causing scratches). Feather edges should be lightly sanded. Grinding and polishing, grinding compound.