Best way to protect your 4x4 from rust?

[Tom Davis]

Best way to protect your 4x4 from rust? I live in a wet environment with salty roads during winter so cars tend to rot after a few years!

 

[Sam Mills]

Take it to a shop to get every single rust spot treated and then spray some protection. Mine has been like this for years and there is zero rust

 

[Tom Cardy]

I haven't done anything else apart from the factory coating. I find that cleaning the undercarriage after driving through salt or mud helps a lot