I cleaned out the insides of the flap torque tubes by running scotch brite pads through and then taped up the holes and ends of the tubes. I decided to use Rust-oleum clean metal primer for the insides of these tubes. I sprayed a heavy coat inside the tubes and rolled the tubes to evenly spread the primer and then set the tubes on end to drain the excess paint.
I spent the rest of the day installing the upper forward fuselage assembly.
The bulkheads rivet to the firewall.