Here’s a couple pictures of the planking. In the first one, you can see that lots of planks have been hung. Some are douglas fir, scarfed into the old douglas fir planks, the others are African Mahogany (Sapele).
In this second picture, you can see an electric hand planer taking off the excess wood on this plank. The boards start as 2″ rough stock thickness and are planed and scrubbed down to a final shape that is slightly curved and 1 3/8″ thickness.