Hi Cudovich,
I used that Rust0-Oleum product on the bottom of my ICC and the bottom of the tongue box. It’s a “just okay” product. It does what it says, but is only as good as the number of coats you use. I think I put 3 coats on the bottom of my ICC. It could still use more. TIP: Use a brush to apply this stuff. The roller — at least the CLC yellow ones we all know and love — won’t work. Stick with a brush and apply LIBERALLY and you’ll be all set.
That said, I’ve heard good things about the Raptor bed liner. As far as I know, it must be sprayed on (there are kits that include the right sprayer, etc) and it is definitely more expensive than Rust-Oleum.
I have some pictures here: @okoume_overland on Instagram.
Have fun! — John in Chicago