Does Rain Affect Car Paint?

[DiRyan]

Rain does affect car paint and can cause corrosion. Rainwater is slightly acidic, and if a car is left wet from rain for an extended period without being washed, the concentration of acidic substances in certain areas can increase, leading to paint corrosion. When rainwater falls on the paint surface, it spreads out due to dust on the car's surface, which turns into mud upon contact with water. This mud can absorb water, forming a film of water on the paint surface. Besides making the car dirtier, this accelerates the erosion of the paint by acid rain. Water stains are often more noticeable on the car's hood because the engine generates significant heat while the car is running, causing rainwater to evaporate quickly and leave marks. If these stains penetrate deeply, waxing alone may not remove them, and professional detailing at an auto beauty shop with a polishing wax may be required.