Originally Posted by
jester_s1
Have you thought about using your heat gun to add some washout to the wings? You just hold about twice the twist in it that it needs and shrink the wrinkles away. It may take a couple of tries to get them even, but it's not hard.
That is a good technique for built-up wings, but this is a straight foam core plank that is fully sheeted. Not sure if the covering could overcome the stresses in the sheeting but might be worth a try.