This is the fourth and last coat of paint, and it's really looking good. I only gave the bottom two coats since I'm not really very concerned with how that side looks. Although the Brightsides is incredibly demanding, it is an excellent paint which levels nicely and leaves a great finish. The first coat didn't go on very smooth but the later ones got progressively better.
In retrospect, I should have done a few things that would have paid off in the finish. I could have been more careful sanding the epoxy and saved myself a coat of paint. The douglas fir, being a soft wood with large growth rings, left a bit of a mottled look to it no matter how hard I worked the epoxy and paint. A hardwood plywood - even just a veneer - would probably have made better sense here. Also, I should have purchased a second tipping brush for the final coat for a perfect finish. The one I had used all along was falling apart and leaving chunks behind in the paint, which weren't welcome on the final coat.
All in all, I used 1/2 of a quart of paint.