RE: Fiberglassing the airplane questions.
Alex, Here's one more for you. Dan
Brush on a full strength coat of Valspar Lacquer Sanding Sealer NAS1420. A well-stocked paint store that caters to the professionals will carry this. It is usually used for furniture finishing. One of those two-inch inexpensive disposable brushes is ideal for this application. Sand lightly with 220-grit sandpaper. Apply ¾ fiberglass cloth over the surfaces brushing through it with the sealer thinned 100% with lacquer thinner. Sand lightly with 220-grit sandpaper. Brush on another thinned coat of the sealer. Sand with 220-grit sandpaper being careful not to cut into the cloth. Brush on two more coats of the thinned sealer. Try to fill the weave of the cloth as much as possible. Sand with 150-grit sandpaper to keep the surface flat and smooth.
Spray on three coats of Pacific Coast Lacquer’s PCL 913 lacquer based primer(Dupont and PPG are the same) thinned 125% with medium lacquer thinner. Sand the first coat with 100-grit sandpaper, the second coat with 150-grit sandpaper and the last coat with 320-grit sandpaper. You should now have a pretty good surface for your color coats.
Apply a coat of Kilz that is thinned to two parts Kilz to one part naphtha. This will improve the adhesion of the final color coats.
Paint with Benjamin Moore’s oil based paints. Use two coats of paint, each thinned to a mixture of two parts paint and one part naphtha.
Change the process as needed for a fuel proof finish if you are not going to use a gas engine.