Is the exposed white color the primer layer of car paint?
2 Answers
If it's a white car, this indicates that the primer hasn't been scratched through yet. If not, check whether the white is on the surface of the metal pillar. If neither is the case, then the exposed white color is the primer layer. Here is some extended information: 1. Automotive primer: Automotive primer is the first coat of paint directly applied to the surface of treated vehicle components, marking the beginning of the entire coating process. It is designed to have excellent adhesion to the substrate, good compatibility with intermediate or top coats, and must also possess superior anti-corrosion, anti-rust, oil resistance, chemical resistance, and water resistance properties. 2. Development: With the rapid development of the automotive industry, the requirements for automotive primers have become increasingly stringent. In the 1950s, cars were still sprayed with nitrocellulose primers or epoxy resin primers, which gradually evolved into solvent-based dip primers, water-based dip primers, anodic electrophoretic primers, and cathodic electrophoretic primers.
I've seen many car paint issues, and exposed primer is actually quite common. Automotive paint consists of several layers, from the outside in: clear coat, base color coat, and primer. The primer is usually white or gray, serving to protect the metal body from rust. The exposed white is mostly the primer, as the top layers have been scraped off, hit by stones, or aged and peeled away. If the primer is left exposed for too long, moisture and air can corrode the metal, leading to severe rust and higher repair costs. I recommend not delaying—use a temporary touch-up pen as an emergency measure, then go to a professional shop for a new paint job. Also, avoid parking in direct sunlight and keep chemicals away from the car to extend the paint's lifespan.
