After gluing the box together, it needed some sanding.
The lid is made from two fir 2×6 scraps and a redwood 2×4 scrap that John brought home from his job site. Better than average specimens, with fairly straight, tight grain; they are probably from appearance grade stock. I did not have a planer on hand, but they were pretty straight and flat. I used my new jointer to make edges flat and perpendicular to the faces. I also used the jointer to clean up the faces. (This is usually accomplished by a planer) Then I glued and clamped them together as shown in this photo.