Underbody cleaning

[marcus]

How do you clean the underbody of your jeeps?
I want to perfectly clean the underbody including arms, axles, coils .... to discover rust, apply rust converter and repainting.

 

[OverlanderJK]

Hose, soap, water and a brush.

 

[bobfriesenhahn]

Some people have suggested starting with a lawn sprinkler.