Well I have to disagree some with you about a straight wing. Once the Sorgum is applied to both surfaces and allowed to dry, you use a sheet of paper and lay between the foam and the skin. Once you have everything lined up the way you want it, then start removing the paper and laying the skin on the foam. It is normally a rolling action. Never had a wing that was warped as a result of this process. If you are just trying to slap the skin on, Lords know what might happen. It is like the food ad "try it, you'll like it"