Small stuff, wheels, mirrors, grills, etc. do it! However I would not recommend spraying your entire truck. I dipped my truck and although it looked awesome. It was a pain in the ass to clean, especially bugs. Then I got clay mud on it from a camping trip and the adhesion of the mud to the dip separated the dip from the paint with the force of the pressure washer. I could have fixed this, it's actually quite easy stuff to repair, i decided to peel it. Anywhere I didn't get a thick coat ie. under rockers, under bumpers, between gaps, it does not peel off. It also stained some of my pain as well as etched and stained my headlights, and any decals. It also stained the rubber between the flares and the fenders. $400 to replace them, WTF!
Anyways, if you really want to do the whole vehicle, some advice. Clean your nozzle between each coat, make sure to get heavy coverage EVERYWHERE, and cover your headlights.
http://i1344.photobucket.com/albums/p657/pattersin/null_zps244b8608.jpg
http://i1344.photobucket.com/albums/p657/pattersin/null_zps9dcf0c02.jpg
http://i1344.photobucket.com/albums/p657/pattersin/null_zpsa512ce6a.jpg