In preparation to finish the cabinets I removed all the doors and hinges and took some time to make sure all the glue was fully removed from the corners.
I finished the inside and galley with 3 coats of Minwax Spar Urethane. .For the cabinets and the cabin I used a satin finish, and in the galley I used semi-gloss for everything except the counter top which was gloss.
I applied the polyurethane to the cabinet door separately.
I chose not to stain the wood because I wanted to keep it light, as well as birch is notorious for coming out blotchy and uneven when stained. The Minwax Helmsman gave the white birch a warm golden look.