Thanks CB, I understand the principles involved and my train of though is coming around to liking this idea.
My point on the insulation was why do they use a material (sponge/fibre) placed against the aircraft skin whose insulating thickness also contains a large proportion of cabin air. Could they not use a different kind of static insulation next to the cold skin that doesn't have room for the cabin air so as not to form any condensation in the first place.