RE: 1/12 combat wing washout
Ok, thanks.
13mm is a lot of twist. You could start by soaking the top and bottom sheeting with either Amonia (works best), Alcohol (better than water) or water (works ok) and twist in the opposite direction until the warp is out. Using a heat gun helps to speed the process by rapidly drying the wood.
Please, if you use Amonia, use it where you'll have plenty of fresh air because the stuff STINKS.
And, if using Alcohol, be extremely careful using a heat gun over it because it is flamable.
HTH,
D