Glassing a sheeted wing is a very common finish. Usually, the entire plane is glassed. The glass that is used for a plane is very light, weighing .5 to .75 oz per square yard, an only one layer of glass is used. The important thing is to use as little resin as possible. Resin is added to the center of the area you are working on, then squeegeed with a business card size piece of plastic till the entire glass area is whetted. Then, toilet paper is used to remove more resin to the point where fresh paper will not pick up any more resin. When cured, the surface will have the texture of the weave. This is covered with light coats of primer and sanded down between coats till just the weave is filled. Any deeper depressions can be filled with a lightweight filler. You don't need to worry about feathering the edges where fiber overlaps because the glass is so thin, the primer is enough for feathering. The plane is then painted. The result will not be a bullet proof surface, but it will help prevent your fingers from poking holes. Do a search and you should be able to find detailed instructions for glassing your plane. The main reason sheeted planes are glassed is not for strength, but for producing a smooth, even surface for painting.

Scott