in all seriousness, there are a lot of low buck options ive seen in my last 5 years wheeling.
1. camoflauge, if you take your time it can look really neat.
2.bedliner.
3. krylon, ive seen alot of people get good results, just take your time sanding it smooth etc.
4. my samurai is rubberized undercoating with krylon clear-coat over it.
it's no show stopper, but its definetely a 20-20 truck, and looks good on the trail.
i made the mistake with my first wheeler of haveing it look really really good. and that made it look really really bad
if you just want it to look ok, its easier to keep it ok.
it all depends on your driving style, and wheeling habits i guess.
my wheeling motto is usually
"any wich way you can"
wich means i usually hit a few things on the way up the trail,
good luck.