I wouldn't use a bedliner. That stuff belongs in a truck bed, not a boat. It can also hide problems like cracks or delamination. Have you considered gel coating/painting and or flow coating it? Couple guys have gone that route and it looks really trick.
I have used the spray on liner before with great results. if you spray it close ( not to close ) its smooth and if you spray it like the stuff says its coarse and is hard to clean . leaves a textured finish and dust/dirt love to get in there...
"Right" would depend on what's right for you. I've seen pics of bedliner with color added used for a non-skid coating that looked OK. I personaly wouldn't use it on the bulkhead or transom as the stuff is heavy. I used Rustoleom roll/brush on paint I bought at Home Depot and it turned out OK, it's real durable for paint. You can also sand it down a little bit and apply some resin to it. Probably the next step up would be to do gel coat/flow coat to it. A lot of what's right depends on your wallet, time, and skills.
If the wood was premo condition i'd say leave it natural..... It looks to be weathered a bit. Sand it smooth and paint it with gel, if it has been coated with resin. It would not be the end of the world to replace the bulkhead, and leave it natural looking. Mine was covered in a layer of mat then covered with cloth. The fibers disapear when rolled out by the fiberglas roller.
That looks killer!! Are those stringers thinner that 2x material?? They look thinner,maybe it's an optical delusion. Sleek yours is coming along nicely also,floors(stringer, bulkheads, ect) look awesome,nice work for sure