ORIGINAL: vasek
on the vid the guy states you MUST do both sides of a surface at the same time to avoid warping it.
He also says he waits 1/2 hour (til the first side is dry to the touch) to begin the second side.
I would be scared during the half an hour that the balsa covered surface would already start to ''move''. This is just speculation on my part, as i have not tried it myself. Would also love to hear from someone who has tried it on sheeted surface.
My fuselage is sheeted. It works just as glassing does. If the part is a foamie wing, yes, both sides must be done. Even paint will warp a wing in that case, if not applied to both sides. I am doing a 100" Corsair I will be using it on. I'll update here as I work more with the stuff.