I've used Ryno-Liner on some rocksliders (heavy duty frame mounted need bars) I built for my Tacoma.
They offer a lifetime warranty against anything that happens to them. I was told if there is ever any damage, I could bring them back and they would respray them for free.
I had them sprayed at the facility near ft. Gibson. They also sprayed paint over the coating immedialty after coating them to make them shiny. They were sprayed a couple years ago and still look new. And you can imagine the abuse they see while driving down a gravel road.
I bought a used truck with Line-X already sprayed in the bed. It began flaking off the tailgate. Took it to Line-x of Edmond and found it had been applied incorrectly. They stripped and re-sprayed it under warranty even though I was not the original purchaser. That was a 100k miles and a bunch of hauling and deer hunting ago. Great stuff and great service.