Line-X uses the "hot method" to apply their product. It dries almost instantaniously. Some of the others use a "cold method"
of application that takes awhile to dry. The difference, as explained to me, is that on high spots (like the ridges that go down the floor of the bed) the product wants to flow down into the lower valleys of the bed. With the "cold method", you have to apply a lot of the product to the tops of the ridges & sidewalls to counteract the slumping, thinning effect. The "hot method" dries before it can significantly slump.
I think Line-X has a product that counteracts the effects of the sun on the product, also. Something to look into. Your truck will look shinier, longer.
Another thing is that the "hot method" gives you a finer, stippled texture. The "cold method" has a texture thal looks like cottage cheese. Kind of lumpy, curd-like.
Joe F.