I used it to cover part of the wing when I repaired a trainer. It is low temerature covering and it doesn't shrink a lot. My patch job looked "OK" and stayed on about as well as the original ARF covering. I have read that it is not fuel proof and that oil will seep under the seams and make it come off.

People sometimes use this, and Econokote, to cover foam wings that cannot handle high temperature covering. Combat guys use it. Those wings usually get detroyed quickly enough that they don't have to worry whether it's really fuel proof.