After clearing the excess resin, I started riveting the hinges on the bottom cowl. Immediately I realized I needed to first glue the hinges on, not just rivet these. On the aft edges, the interference between the hinge flange and the honeycomb meant that riveting the hinge could cause the rivets to tip, and leave a cavity between hinge flange and cowling. I mixed up some resin and glued all of the hinges into place. As a release agent, I used some Boe-lube on the ends of the clecos holding the hinges.