You can indeed use steam to correct a small warp. Just get the tea kettle warmed up and hold the effected area over the steam and then set the wing down on a table and get it into the needed position to make things straight. Let it sit for an hour or so and do it again if needed. If it is only a real slight warp, you can even remove it with the covering if you are are using Monokote. Good Luck, Dave