I really wasn't to confident with the Herculiner and the Duraliner I saw at Auto Zone. After reading the cans didn't seem like they would work as well as they advertise. I did find some stuff called Grizzly Grip that I am leaning towards, it is an oil based polyurethane which you mix an accellerant with which can be sprayed or rolled on. Advertises that the more humidity in the air, the faster it sets, not sure how that works though. I'm going to contact them and ask what kind of accelerant they use(isocyanate?) All in all, I just like having projects to do, and if I let LineX do it then I have to look for something else to do.
Let me preface this with I manufacture at my cost 7 digiits of actual polyurethane (FWIW-Polyurethanes are the best automotive refinishing products made BUT there is no such think as the polyurethane verification police so this desirable term is used loosely to say the least) paint coatings for living and I've painted a vehicle or 50 but I forget.
Without getting into specifics the grizzly homepage is full of contradictory nonsense such as 'moisture cured polyurethane' which could easily mean hybrid lacquer like unactivated basecoats and the most peculiar thing is they will warranty its 'pot life' 30 days from the day it was shipped.
Even an opened can of lacquer or straight enamel has a shelf life significantly longer than this and do note that pot life is an industry term for how long a product such as a true polyurethane that requires activation from a separate Part B isocyanate based activator and once part A is mixed with Part B and crosslinking begins so does your pot life. In other words when the activated product begins to gel to at a predetermined point which is usually when sprayability no longer exists you potlife is done.
Run because straight enamel/hybrid lacquers/moisture cured polyurethanes can be made for $5 per gallon including the . 40 can and the . 20 label.
Now if you stumble across any 8:1 bedliners you are buying activated enamel paint which was da bomb on 70's era cars at least for the first six after application and even today activated enamel is perfect for throw away lawn mowers or mailboxes.
The problem with epoxies such as Gator Guard is they lack flexibility, you can't add enough UV inhibitors to epoxy products for long term weathering which is why black Gator Guard chalks out from a shiny black in 3-7 months on average.
Tell me this: since you like your Rhino Liner which is a 2 component activated 'hot spray' polyurea how close in strength, durability and thickness does what you are looking for to apply in your wheel wells need to compare to Rhino Liner because every DIY bedliner previously mentioned in this thread wouldn't achieve 10% of what the Rhino offers and I say this as a causal Line X fan that personally wouldn't own a Rhino Liner if they were both free and given a choice.
Here is an example of a moisture cured ie glorified lacquer product that I'm familiar with, costs less when shopped locally than your previous choices, is a moisture cured 1 component product and is marketed ethically meaning they state its basically a glorified undercoating and nothing more.
http://cgi.ebay.com/ebaymotors/U-POL-GRAVITEX-ROCK-STONE-CHIP-PROTECTOR-UNDERCOATING_W0QQitemZ200095520513QQcmdZViewItem
While I'm unfamiliar on the current list price of this product I can tell you for the last 10 years UPOL has given its warehouses and it's auto paint store retailers a free applicator gun as shown here with every 3 liters purchased so keep that in mind.
Am I saying this makes a great DIY bedliner? NO WAY!
Am I saying compared to the moisture cured single component 'polyurethanes' mentioned above that were probably on the same page if not close? Absolutely!