Rhino liner was once the rage here with the flat bottom duck boats. But then they all started boat racing more than duck hunting and found out that the rhino is heavy stuff and slowed the boats down considerably. This is applied to the entire inside surfaces of the boat and nowhere else. Many of the boat racers aka duck hunters also found out that since they slowed their boats down, they wanted to upgrade to a bare hull, or a faster hull, so they sold the old rhin-lined boat. What they found was that not everyone wanted the rhino-lined interior and thus it affected the resale in a negative way. Something else worth considering, for what it's worth.
I like Nautilex, and it's not permanent as it can be removed later on down the line if you want. It's basically a paintable vinyl type stuff that comes in sheets that has a texture similar to rhino liner. Lot of boat manufacturers use it. I'm actually considering buying some for mine. Right now it's painted aluminum and that floor will burn your feet this time of year. Yesterday I spent most of the afternoon on the water watching the fish and animals react to a total solar eclipse, which was interesting to say the least, but before and after eclipse that floor was so hot that my shoes were leaving marks on it. I wasn't uncomfortable but I sure didn't want to take my shoes off and go barefoot-which I generally like to do when I'm on the water.
Something else I didn't like about it is that the little tiny nooks and crannies of the bed liner hold dirt. In time it looks like poo. The liner is also sort of an attractant in that when dirt does get into it, it's hard to get out. Had a truck that had a rhino-liner and while it was sort of nice in that stuff didn't slide around, if you use it for a truck, it gets dirty and has to be scrubbed to get it semi clean.