It's been long and arduous, but it looks like all the paint is finally off the inside of 'Billie' 4715. There are some detail shots here showing the extensive repairs yet to be made of damaged stringers, etc. The entire cargo door frame is being replaced. Also see shots of some of the markings inside the cabin. These were preserved by the aluminum tape you can still see while the paint removal process was going on.

This has taken a lot longer as Billie was in a lot worse shape than originally thought.