Since I was trying to be nice to the neighbors this morning and not rivet until after 8am, I decided to scuff, clean, and spray prime the tack attach brackets as seen in the first photo. Ended up using a rattle can etching primer. Pretty handy for small prime jobs that I need done without waiting for a large spray session.
After priming I then spent most of the day riveting the right fuel tank ribs. Ended up taking two sessions, each about 2 hours long to complete. Will try to get the left tank ribs installed tomorrow.