Why is repainted car paint not good?
3 Answers
Introduction to the reasons why repainted car paint is not good is as follows: 1. The difference between original paint and repaint: The original paint is applied through electrostatic spraying directly on the assembly line, resulting in more uniform paint coverage; whereas repainting is done manually, leading to inconsistent paint uniformity. 2. The difference in painting methods: Original paint is applied during the manufacturing process by immersing the parts to be painted into a container of paint, then removing and drying them after full coverage, followed by sending the parts with dried primer to a dust-free workshop for painting and baking; while repainting is done manually using painting tools, generally with inferior results.
As a veteran driver with over ten years of experience, I've seen plenty of issues with repainted car finishes. Factory paint is processed on professional production lines, baked at high temperatures multiple times, resulting in a thick, airtight paint film. However, repainting at repair shops often suffers from inadequate temperature and humidity control, thin paint layers, and poor adhesion—watermarks or peeling appear after just a car wash. Color matching is difficult; while new car paint is vibrant, repainted areas darken within months, looking like patches in sunlight. Unclean painting environments can introduce impurities, leading to rough, uneven surfaces. My neighbor's car developed bubbles and rust after repainting, posing serious safety risks. I advise owners to avoid unnecessary repainting for minor scratches and to choose certified shops for major repairs, emphasizing thorough drying and regular waxing to slow corrosion. Proper body maintenance helps retain value and extends the car's lifespan.
In my observation of vehicle maintenance practices, the drawbacks of post-production paint jobs are evident. Original factory production involves precise assembly lines with uniform paint formulations, undergoing multiple high-temperature curing processes to form a robust coating. In contrast, post-production painting often suffers from inadequate facilities, resulting in uneven application and weak paint adhesion, with a high risk of blistering or peeling due to moisture intrusion. The quality of materials varies widely, with low-cost paints exhibiting poor colorfastness, prone to fading and color mismatch, and even revealing repair marks due to differences in old paint surface reflectivity. It is recommended to use environmentally friendly primers and ensure thorough drying between multiple coats. In the long term, post-production paint durability typically falls short of five years before requiring rework, increasing vehicle ownership costs. Regular inspection of the paint surface is advised to prevent minor issues from escalating.
