Rustproofing and Undercoating

[PARAGON]

Screw all that. It's the underside of your truck and any kind of paint is going to scrape off.

I use something called Fluid Film on all kinds of stuff. You can spray it on bare metal and it bonds with the metal to keep it from rusting. It was developed for use on Nuclear subs to the Space Shuttles and is also a great lubricant.

http://www.eurekafluidfilm.com/