Alternative to carpet

I did that on a plow truck.
Pulled the cab and fixed all the rust. Had the entire cab rhino lined professionally done after a complete sand blasting. Looked pretty good but sadly moisture got in some how and the cancer spread like wild fire.
If I had to do it again- I’d only do one side and not the whole thing. I like 2-3 coats of heavy rust oleum on the inside the floors. Color can be close to outer body but because under the rug - nobody sees it.
Takes a few days to dry but works great.

Hard to beat a good painting to keep moisture off of the steel surfaces.

Snow plow blades come with that baked on powder coating. They get scratched and then the moisture seeps in under the edges and makes a rusty mess out of the whole thing.

Can't hardly sand it off to take care of the rust, so you have to take paint stripper to melt it off. Then you can sand blast the rust off of it.

Then it's back to putting on a good coat of primer, then 2 good coats of paint with the hardener for a lasting finish.