Why is the car paint cracking?
2 Answers
If corrosive substances such as bird droppings or tree sap adhere to the car and are not removed for a long time, exposure to high temperatures in summer can cause the car paint to crack. Here is some relevant information about car paint: 1. Introduction: Car paint is a protective film sprayed onto the car, a type of coating that makes the car body less susceptible to corrosion and also provides an aesthetic appeal, with different car paints offering different effects. 2. Advantages: The main characteristics of car paint include excellent film fullness, high gloss, high hardness, good adhesion, superior mechanical properties of the paint film, outstanding gloss retention, weather resistance, and wear resistance, as well as good resistance to acids, alkalis, alcohol, and gasoline.
I have quite some experience with car paint cracking, mainly three common situations. First is paint aging, especially for cars over five years old. Constant exposure to sunlight combined with winter freezing and summer heat causes the paint surface to gradually develop fine cracks that eventually split open. Second is poor-quality touch-up paint. If you had a scratch before and just sprayed on some cheap paint, the lack of adhesion can cause it to peel and crack. Third is collision damage. Don’t think minor scrapes are harmless, especially on stressed areas like the hood and fenders. A small white spot from a stone chip can develop into spiderweb-like cracks over time. If you notice cracking, it’s best to deal with it promptly. First, use clear nail polish to temporarily seal the crack to prevent moisture from seeping into the metal and causing rust. Then, find a reliable auto body shop to sand down the entire affected area and repaint it properly. Never try to cover it up with a touch-up pen—that will only make the cracks more obvious.
