It would depend on how much you wanted to apply to it. Vinyl is not fuel proof. Fuel and exhaust residue from a glow engine will seep under the vinyl and cause the vinyl to lift back off. Small grahics can be sealed to prevent this. But if you are talking about a large area then you're just going to add even more weight with the sealant. If you have a large area that you need grahics for you should consider using Monokote/Ultracoat. If you have specific grahics or designs that need to be cut you can take it to a sign cutter and have them use a vinyl cutter to cut those designs. A vinyl cutter does an excellent job of cutting the covering.

What plane are you looking for the outline of??

Ken