1, cleaning: First, thoroughly clean the original printing with professional cleaning agents and tools. You can use car spray cleaner and other cleaning agents, spread newspapers or plastic films nearby, evenly spread them with brushes, sponges and other tools, and wipe them clean.

2. Polishing: Polishing the changed part to make the surface smooth and remove the residue and defects of the old paint.

3. Masking: Cover unnecessary areas with masking paper or masking tape to ensure that the spraying area is clear.

4. Spraying: In a dry and ventilated environment, use professional painting equipment and materials to spray according to the designed handwriting and color. This process requires skill and experience, and it is recommended to be completed by professional painting workers.

5. Finishing: After the new coating is dry, make some minor finishing and adjustment to ensure the perfect effect.