What is the most common cause of rust formation on the body of an Audi 80 sedan?

I recently purchased an Audi 80 sedan and noticed that there are some rust spots on the body. I want to prevent further damage and need to understand the cause of the rust formation.

The most common cause of rust formation on the body of an Audi 80 sedan is exposure to moisture and road salt. The undercarriage of the vehicle is particularly vulnerable to rust, so it's important to regularly wash and wax the car to protect it.

Another common cause of rust on the Audi 80 is scratches or chips in the paint. These can expose the metal beneath to water and salt, leading to rust formation. It's important to touch up any scratches and have them professionally repaired if necessary.

In some cases, rust on an Audi 80 may be caused by manufacturing defects or poor quality materials. If you suspect this is the case, contact the manufacturer to see if they offer any solutions or compensation.