We have went with "Bullet Liner" on the last couple trucks. The person who developed Linex sold out and signed a 5 year non-compete, however during that time he continued to work in his lab to address the fading problem. When his 5 year non-compete was up, he introduce "Bullet Liner" It is a high pressure, 2 part application much like his old version Linex, but more stable and has UV protectors in it. I have in in my 2012 RAM, and so far it's held up well. I even had the frame of my PullRite hitch lined...
RVman / John