What does it mean when a 4S shop touches up the paint?

[VanJoy]

4S shop touching up the paint refers to quickly treating scratches, which is a localized paint touch-up without affecting other areas. Below is an extended introduction: Painting environment: 4S shops generally only have a separate paint room, and many even operate outdoors. It is impossible to ensure the cleanliness and consistency of the painting environment. Construction tools: 4S shops only use ordinary spray guns for manual work, and the quality of the painting largely depends on the skill of the workers. Baking method: 4S shops generally use baking lamps for curing. Temperature control is also based solely on experience, usually only a few dozen degrees. At such temperatures, the paint surface cannot cure and cross-link well. Therefore, the paintwork done by 4S shops ages quickly and is prone to color differences.