If you want the Koverall to really stick then use SIG Stix-It or similar. I 'burnish' it thru the fabric and into the wood with acid brushes. Dope works very well but takes a little longer. Here is a Fokker Drl wing covered with just one piece of Koverall. The top, bottom, tip, aileron and center section cutouts and center fairing were covered- one piece. It took some doing but is possible. I think you could just about cover a bowling ball with it!

For your wing it is much easier if you remove the hinges.