While I was waiting for my riveting partner to get home, I treated the inside of the rudder tubes. I don't have a ton of primer left, so instead of using primer, I used boiled linseed oil for the tubes. Apparently that is the time tested method for corrosion proofing the inside of the metal in tube/fabric planes. I just poured a bunch in each tube then let it drain out.
When Rose got home, we tackled some of the bottom fuselage skin riveting. She's really good at this whole riveting thing, so it went pretty fast. In order to stay in her good graces and not lose the help in the long run, we limited the time we spent on it, but we still got the long rows done that attach the forward fuselage to the center section. Tomorrow we'll work on the forward section floor stiffeners.