Rust on the underbody

I’d like to get rid of some of the anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion and anti-corrosion.