Laid all the ribs in order on the cardboard. Wrote the wing rib number on the cardboard, and indicated "up". This is because the cleaning will erase my Sharpie writing, and since the rib flanges go in different directions, you want to keep them straight.
Cleaned all the ribs with acetone.
Primed with SEM Self Etching Primer. I like this stuff! Expensive, but dries quickly and sticks tenatiously. Way better than Rustoleum.
I don't really see the need for al lthe fancy primers. Vans is even agostic about the use of primer. The rattle can stuff will work fine for concealed areas. And the SEM stuff finishes very smooth, and really, really adheres.
After the primer dried, I transferred the rib numbers and "up" arrows to the ribs again.
