What is the common cause of rust on Audi A2's body?

I have noticed some rust on my Audi A2's body and I'm wondering what the main cause of this issue might be. I want to know how to prevent further rusting and what steps I should take to fix the existing rust.

Rust is a common issue for Audi A2 owners and it is important to take preventive measures to avoid it. One of the main causes of rust is exposure to moisture, especially if you live in an area with high humidity or regularly drive on roads treated with salt in winter. Additionally, scratches, dents, and chips in the paint can also make your car vulnerable to rust.

To prevent rust on your Audi A2, make sure to regularly wash your car, especially after driving on salt-treated roads. Also, keep an eye out for any scratches or dents and have them repaired promptly. Investing in a good quality wax or sealant can also provide an extra layer of protection against rust.

If your Audi A2 already has rust, it's important to act quickly to prevent it from spreading and causing more damage. You can sand down the affected area and apply a rust converter to stop the rust from spreading. After that, use touch-up paint to cover the spot and protect it from further damage.