RE: Covering compound curves
I start at the back. Get it stuck good back there so you an pull and heat at the same time. It helps to have an extra set of hands or a way to mount the piece down solid. I keep a little pressure on the covering and heat it with a sock covered iron holding the material about 1/4" off of the surface. As the covering starts to get soft I pull it down to the balsa and work forward. If the covering is at the right temp and pliable it will go down smooth and wrinkle free.
David