Regular washing is one of the best ways to prevent rust from forming on your car. Dirt and grime can trap moisture against the metal, which can lead to rust. Be sure to wash your car at least once a month, and pay special attention to the undercarriage
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Wax your car
Applying a coat of wax to your car can help protect the paint and prevent rusting. Wax creates a barrier between the metal and the elements, helping to prevent moisture from coming into contact with the metal. Wax your car at least twice a year
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Address any scratches
Chips and scratches in your car's paint can provide an entry point for moisture and other corrosive substances. It's important to address them as soon as you notice them, by touching up the paint or having them professionally repaired