Riveted the F-1237F Aft Seatback Brace Hinge to the F-1237G Seatback Brace. Had to re-prime the F-1237B and D Angles. The primer did not bind very well, probably because of the high humidity yesterday when I sprayed the primer. Riveted the Angles (F-1237B & D and F-1237C) and Hinges (F-1237F and H) to the Seatback except for the two holes in the upper corner holes. I'm still waiting for the LP4-4 rivets to arrive from Van's. Installed the two bolts in the lower corners of the Seatback Assembly. Prepared a hinge for the Seatback Brace and attached the Brace to the Seatback. Safety wired the hinge pin. Completed one Seatback and will finish the other one this weekend.