The decking is finally finished and sanded smooth.  The decking color will darken slightly once I apply tung oil after finishing the nails and waterway. For the nails I am thinking of using toothpicks again, but slightly smaller than 0.55mm which was used on the hull planking.   Edit: forgot to mention, I did not use tracing paper for the last couple of planks. I just roughly shaped the planks then sanded to fit.