Many drivers like to buy white cars, which are clean, grand, and appear high-end and elegant. But white cars are also more delicate and prone to getting dirty. After driving for a period of time, the white car paint is also prone to yellowing, which can be a headache for drivers. Let's explain today what causes the yellowing of white car paint and how to solve it?
The reason for the yellowing of white car paint
1. The car paint is oxidized and causes yellowing
The ultraviolet rays in the sunlight have an oxidizing effect on car paint. When cars are exposed to wind and sun all year round, the paint will oxidize and turn yellow. In addition, if the car is not treated in a timely manner in the rain, it is easy to leave water spots after drying, and the sand and gravel blown by the wind will hit the surface of the car paint, leaving small scratches. Over time, the protective paint on the surface may be worn off, further damaging the internal paint surface. So it's best to leave the car in the garage, or install a PPF for the car. Motec PPF uses imported aliphatic TPU masterbatch, which is resistant to yellowing and has superior self-healing ability, so there is no need to worry about leaving small scratches on the car paint.
2. Late repainting caused yellowing
Sometimes the overall paint of the car does not turn yellow, but the paint added later on turns yellow. This is because the quality of original paint is actually the best. When vehicles leave the factory, multiple paint layers need to be sprayed, and different paint layers require different processes. Some need to be sprayed in a high-temperature environment, which is impossible for ordinary auto repair shops to achieve. Therefore, the quality of later repainting is far inferior to that of original paint. No wonder later paint repairs are more prone to problems than original factory paint. So many car owners choose to stick paint protection film on their cars as soon as they buy them to protect their precious original paint!
In our daily driving process, if some parts are scratched or scratched, there is no need to repaint them, such as the bumper and other parts. The interior is not actually metal but plastic, so even if the paint surface is damaged, the interior will not be corroded and can be left unpainted. If the repainting is not done well, it will be like a large patch and even more unsightly. Other metal parts with damaged paint surfaces must be repainted. If left unattended for a long time, it may corrode the internal metal.
3. Long term non washing of the car causes yellowing
If the car is not washed for a long time, impurities may seep into the car paint and eventually cannot be washed off, causing the paint to turn yellow. So if it is found that debris such as fallen leaves, tree gum, and bird droppings have fallen on the surface of the car paint, it should be cleaned up in a timely manner to prevent these debris from corroding the car paint and leaving marks on it that are difficult to remove. Not only these impurities, but after being left for a long time, there may be a layer of dust and impurities on the surface of the car paint. It is also necessary to clean it in a timely manner, otherwise it may be difficult to clean due to immersion in the car surface.
How to solve the yellowing of white car paint
1. Attention when washing the car
When washing a car, it is important to choose a reputable car wash shop and use reputable car cleaning agents. Many small car wash shops on the roadside use inexpensive alkaline car wash agents, which can cause significant damage to the car paint. And neutral car wash agents are basically not a problem. The correct car wash agent and washing method can greatly protect the glossiness of the car paint, so it is important to pay attention to it in daily car washing.
2. Pay attention to sun protection
After the previous introduction, we can understand that ultraviolet rays in sunlight are an important factor causing white car paint to turn yellow. Pay attention to preventing direct sunlight exposure to effectively prevent white car paint from turning yellow. We can pay attention to parking the car in an underground garage as much as possible during daily parking. If conditions do not allow, buying a car cover for your car can also avoid direct sunlight exposure. However, when using car clothes, it is important to avoid using them in windy weather and ensure that the car body is clean. This is because when the car clothes move back and forth in strong winds, if there are debris or gravel inside the car body, it will repeatedly rub against the paint surface, causing damage to the paint surface. The best way is to install paint protection film, which can resist UV rays and prevent paint aging and fading.
3. It can be solved through polishing (not recommended)
If the white car paint has already turned yellow, it can be solved by polishing. Because the yellowing of car paint is caused by the yellowing of the surface varnish, which is colorless and transparent. The white color is mainly the paint that is covered by the varnish. The paint is not in contact with air and is not affected by ultraviolet rays in sunlight. Therefore, simply remove the yellow color from the surface of the varnish by polishing. However, polishing should not be done too many times, as it will cause the varnish to become thinner and thinner. Cars cannot withstand multiple polishing cycles. Polishing a car 3 to 5 times is safe, and the same position should not exceed 8 polishing cycles at most. The most cost-effective method is to apply paint protection film, which is long-lasting and resistant to yellowing, and can also repair small scratches.
