I just got done cleaning the underside of my RV hood. It was dirty and I didnt like the way it looked so I washed it and waxed it... Cleaned everything else under there too..
Absolutely agree with all the other guys that clean their engines. I have never, ever not gotten top dollar from usually the first potential buyer who would exclaim "wow that's clean, you must take good care of this". If you are kooky enough to keep a clean engine you must be passionate about taking care of the rest. And I am.