I haven't lined my jeep yet but have looked into it. There are basically two types of professionally sprayed in liner hot and cold application. The hot is Line-x and (I forget the names of the other brands) They look great and are harder and have a more "plastic" feel, seem to be very durable. The cold application is Rhino, etc. they may take a little longer to cure and have a more "rubber" like texture, and are very durable as well. Older rhinolined beds I have seen did not have as uniform a look to it.
When I ever have the money, hopefully in the next few decades
, I will go with Rhino, I have friends with both types, hot and cold, and prefer the slightly softer, rubbery texture of rhino, things don't slide around in the back as much as with the Line-X. Also the Rhino seems to have a much better uniform texture to it than it had in the early days. I got a quote from one Rhino dealer, $550, with warranty.
Regarding the roll in DIY liners, the thing I don't like about them is, I researched the thickness of them and you have to do something like ten or twenty coats (can't remember the exact number
) to get the thickness of Rhino or Line-X. But it is an economical alternative for some bed/tub protection.
Ben