How to prevent rust build up on a Ford Focus engine?

I have noticed that my Ford Focus engine is starting to show signs of rust. What can I do to prevent further rust build up and ensure the longevity of my engine?

Regularly cleaning and protecting your engine with a rust inhibitor can help prevent rust build up. Make sure to also check for any leaks that could be exposing your engine to water or moisture.

Applying a coat of rust-proof paint on areas prone to rust can help protect your engine from corrosion. Make sure to use a high-quality paint and follow the manufacturer's instructions.

Regularly checking and replacing any damaged or worn out gaskets or seals can help prevent water from seeping into your engine and causing rust.