RE: cellaphane
If true - then yes, I've used that stuff to cover foam wing models. Has no adhesive, however, and you need to spray 3M-77 or a similar contact type cement (that won't melt foam!) in order to stick the covering on. Call it iron-on fuel proofing - it adds no strength or torsional stability - though it does heat shrink at low temps, so it doesn't melt the foam.