I would NOT recommend doing the exterior of your Jeep.
Just like Inferno Girl said, it will ruin the value of your Jeep,
and once it's on, there's no turning back, your stuck with it.
In a few years it will look like crap.
I was considering doing the same thing to a truck that I have
until I saw this Monstrosity at a Line-X shop:
This is how your Jeep will look after 8 years.
Hell...it might even look that way sooner,
I just know that 8 years is how long this truck has been coated with that garbage.
And this picture really doesn't capture how terrible it looks in person either.
After seeing this truck,
I won't even consider spraying just my bed with this junk.
This might be an okay thing to do to the inside of your tub
where the sun is not going to be so focused on it,
and all the mud and dirt will not be getting caked on and embedded into it,
but you might want to re-think doing the exterior.