I like liner, but I use it for a different reason, I shoot the liner first and then shoot a ceramic coating like Cerakote air cure with ceramic micro spheres mixed in. The spray in liner I like to use is a 2 part system and I use it because the texture builds a larger profile to build up more of the ceramic microsphere layer, thus making it better at noise reduction and heat dissipation. I know it sacrilegious around here, but after that I like to cover the whole thing up with a nice 5 bar chequer plate. I think metal is better than any of the coatings for a durable and long lasting floor. But I know a lot of people think tread plate for floors is played out, because people went crazy with diamond plate and plated everything.