RE: Sealing and Painting Balsa
Not sure how what you're doing will work, I'm gonna watch closely. I can tell you from what I've seen that a wing just sealed and painted, the balsa eventually splits. I have an old JU-52 I got at an estate sale. The wings are not glassed or mylar covered, just sealed and painted. At home I noticed the bottom of the wing had several splits in the sheeting. I've also seen this on planes for sale at swapmeets that were finished the same way.
Edwin