If the covering doesn't do it for you, you can uncover the framework and tightly wrap spirals of kevlar tow saturated with laminating epoxy around the aileron. Each end of the tow can be glued to the franework with thin CA to keep it in place while the epoxy cures. Blot off the excess epoxy with paper towels. Make both spirals at 45 degrees to the length of the aileron and crossing each other at 90 degrees. Then recover with any convenient film covering. If you are fussy about bumps in the contour, you can recess the kevlar tow by sanding in minimum grooves in the framework to let the kevlar lie flush. The kevlar tow is only 1/8 inch wide and a few thousandths thick.