A Newbie's Guide to Plywood Plank Flooring: Prepping and Laying the Boards - Shark Tails Part 1 another very good DIY On plank floors. GOod info on sanding the boards a nice before and after shot of that.
Maybe wouldn't work with radiant heating, but I love this look. But how to make it damage resistant? Clear epoxy perhaps? If we do this it can't have voids and it needs to be a harder wood, like oak (and expensive).
HOME: DIY Plywood floor = Inexpensive paintable floor. A pinner said "Did this in our house.we just put the sheets of plywood down and routed out grooves.then some stain and poly.its been ten years and still looks great and we love it.