We remodeled an old trailer house. The floors were partially redone already, and we originally planned to use laminate flooring. Then we got the idea to use plywood. We sanded it ourselves and stained it with a dark walnut stain.
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.