I cover the wings and ailerons at the same time. All of the surfaces that aren't silked receive two to three coats of MinWax. After priming they look like they have been glassed. I use two thin stainless strips to hold the ailerons (and elevators) on. What I use is men's dress shirt collar stays. I would think the plastic would work fine as well. I slip them into the hing slots.
http://www.stiffstays.com/