Is Rainwater Corrosive to Car Surface Paint?

[McIan]

Rainwater is corrosive to car surface paint. Here are the specific details: 1. Nature of Rainwater: Rainwater is weakly acidic. Due to environmental pollution, it cannot be ignored just because it appears clean on the surface. If a car is left wet from rain for a long time without being washed, the concentration of acidic substances in localized areas will tend to increase. As we all know, acidic substances can corrode car paint. The outermost layer of rainwater spreads across the paint surface because the car's surface usually accumulates a thick layer of dust, which turns into mud when it encounters rainwater. Mud can absorb water, so rainwater directly forms a water film on the paint surface. Besides making the car increasingly dirty, this also accelerates the erosion of the car body's paint by acid rain. 2. Rainwater Stains: Many rainwater stains are mostly found on the car's front hood because the engine generates a large amount of heat when the car is running, causing rainwater to evaporate more quickly and leaving watermarks. If the watermarks penetrate deeply, waxing alone may not remove them. In such cases, it is usually necessary to go to a car beauty shop for maintenance, where a surface wax polish is required to address the issue.