Tonight I began to alodine the ribs. It starts out by submersing them in Alumiprep 33 etching solution for 4 minutes to clean the ribs. Then a rinse in clean water and straight into the Alodine solution for 4 minutes. Then they are rinsed in clean water and hung to dry. I'll have to show the finished ribs on the next entry. Tonight I finished all of the flap and aileron nose and pocket ribs.