Can Applying Engine Oil Prevent Rust After It Has Already Formed?

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No, you need to grind off the rust layer, perform anti-rust treatment, and then apply paint protection. Below are the precautions for preventing rust on car bodies: 1. Wash the car frequently: Regular cleaning helps maintain the car's cleanliness and prevents rust or corrosion. When driving on roads with salt or alkali in winter or near coastal areas, ensure the car is washed at least once a month to minimize rusting. 2. Repair damaged paint promptly: If cracks or other damage are found on the car body's paint layer, use quick-drying paint to repair them immediately to prevent rust from starting. If rust has reached the metal part, take the car to a repair shop for repainting. 3. Install mudguards: If driving long-term on salt-alkali or gravel roads, install mudguards on the car to effectively maintain cleanliness. Larger mudguards provide better protection.