I would OraCover the flapperons as well, if I were you: Nice straight and flat pieces - and you'll be sure of the coulour gliss, lifetime, decoulourisation and so on. And fun to do, as well.
One question though: Steward and Poly (and Kitfox as well) urge you to put reinforcements onto ribs, longerons etc. I don't see that in your first result. Are you still up to that one or is OraCover that strong that you can leave those parts?