Spray in Bed Liners-----DIY?-------

[chuckmc8]

My 00 Silverado has a drop in liner that needs to gooooooo and my 67 fleet bed needs shot liner also.
So, I look at the options for kits. Looks like there are several on ebay, but there are at least 2 types, Urethane and another "2 part" system that seems to caution about liners that dont use an activator.
I really dont know anything about these different systems, but I have a couple buds that also need liners that we could split the cost of a better application system (guns and hoppers)
I don't want something that turns out to be thin and look like a homemade roll on jobbie.
Whats the closest to the commercial applications like line-x or rhino thats available for DIY? Is there a 'hot' spary available? I have commercal air power and such.
Thanks!