RE: Fiberglassing the airplane questions.
Pretty much what was stated here......
Use Zpoxy finishing Resin, West System Epoxy or Polyuthrene (never used this) over the glass.
Remember that a joined wing you put thicker cloth more for strength. On the wing itself you are only putting cloth on there for hangar rash and for a smooth paintable surface. The less amount of cloth and resin you put on means less weight and less sanding.
Apply very light coats. Might take you a few extra days as you wait for things to dry but its less sanding. Wear gloves/mask/googles when sanding the Fiberglass and I like to have a vacuum nearby as well.