I've used TowerKote and Econokote and found both ok to do the job and both seem to be fuel proof. I have an old foam wing Sturdy Bird covered with this stuff, 12 years old and still flyable with no signs of deterioation.. Also use it for trim and repairs in some spots. Both are low temp coverings and thin. They are designed to be used in special applications requiring this type of film only. Most other applications it's better to use MonoKote or similar high temp thicker films.