You just spray the wood with a 50/50 blend of water and ammonia, let it soak in for a while and start sheeting. I pre bend/form a lot of the smaller sheeted parts using different things like spray paint cans and different objects by sparying and using rubber bands to hold the wood until dry. Next time I build something like another Sukhoi I want to try the co flex, I just heard of it when Ken did the post. Sounds good to me.