Differences Between Original Car Paint and 4S Shop Repainting?

[DiFinn]

Differences lie in: different spraying environments and different construction tools. 1. Spraying Environment: The OEM paint shop is a sealed positive-pressure workshop where air is purified through multi-layer filtration and oil-water separation, ensuring extreme cleanliness. In contrast, a 4S shop typically has only a separate paint room, and many even perform outdoor operations. It is fundamentally impossible to guarantee the cleanliness and consistency of the spraying environment. 2. Construction Tools: At OEM factories, robotic automated spraying is used, making it much easier to control the uniformity of paint film thickness, color consistency, and aging consistency compared to later repairs at 4S shops. 4S shops, however, only use ordinary spray guns for manual operations, where the quality of spraying largely depends on the skills of the workers.

[LeLeonardo]

As a car detailing shop owner, I deal with the aftermath of paint repairs every day. The most headache-inducing issue is color mismatch. Factory batch color mixing is as precise as printing, while even the most accurate 4S store color mixing will have a deviation of a few tenths of a shade. This difference isn't noticeable on sunny days, but becomes apparent on cloudy days. The paint surface texture also differs - factory robotic arm spraying achieves even coverage with clear coat thickness variation within microns, feeling liquid-smooth to the touch. Manually sprayed clear coats often have paint buildup or uneven thickness, feeling rough. Then there's dust control - no matter how professional the dust-free booth is, it can't compare to an automaker's fully enclosed environment, so repainted areas often end up with embedded particles.