Riding lawn mowers

I wouldn't think you'd want the rough texture of bedliner.
I wire wheel mine as bare as possible, then 2 coats of por 15/ and then whatever I have sitting here, the last 4 decks have gotten 2 coats ea of forest green Industrial Rust-Oleum on top of that, just because the can was getting old, I had about a 1/2 gallon left in the can from when I built my utility trailer, and it was gonna go bad if I didn't use it up somewhere.
That can of Rust-Oleum was 11 years old
Don't care what brand of mower as you don't see the bottom of the deck very often anyway.
Has left a slick shiney coating when dry, which makes for cleaning and scraping much easier,
This is why most decks rot out, most these days don't ever clean the bottom off, besides mowing wet grass. Not to mention the thin ness of the sheet metal most stamped decks are made of, these days.
I see more newer ones coming with fabricated decks/ most of them sturdier than any stamped deck in years and years