Grind off all the rusted areas, apply a layer of anti-rust paint first, and after the anti-rust paint dries, apply another layer of color paint that matches the original car color. Below is an introduction to the methods for dealing with rust on car door edges: 1. Be vigilant about small scratches in subtle areas: Rust often appears on the car paint surface, not only due to common collisions and scratches but also because small stones kicked up by tires while driving can hit the paint surface, causing small peeling spots that can develop into small rust spots over time. These small scratches are often overlooked because they are usually in inconspicuous places. Therefore, it is important to regularly inspect the car body, engine hood, and surrounding areas, and address any issues promptly once discovered. 2. Frequently check the humidity in areas prone to water accumulation: It is inevitable for vehicles to encounter rainy or snowy weather or pass through muddy and waterlogged roads while driving. Areas such as the bottom of the car body and gaps are prone to accumulating sludge. If the owner does not clean them in time, moisture can hide there. Therefore, it is essential to regularly inspect areas like the inner and outer edges of the wheel hubs, doors, bottom edges of the trunk, keyholes, and moving parts of the wiper arms. Additionally, ensure that the drainage holes in the doors and various parts of the car body remain unobstructed, and check the humidity of interior coverings, such as carpets, to prevent rust on floor components. 3. Apply glaze to soft paint surfaces: For vehicles with softer paint surfaces, sand particles hitting the car body during high-speed driving can cause fine scratches. For such cars, applying glaze to the car body can form a strong protective mesh film, increasing the hardness of the paint surface, with effects lasting about a year. Coating can also achieve similar results. Moreover, the vehicle's undercarriage can be treated with chassis armor or sealing to protect it from acid rain and corrosion, preventing the original protective layer from cracking or peeling off, and also shielding against small stones hitting the chassis while driving.
