RE: To Fiberglass or not to Fiberglass?
you put a coat of sanding sealer down 1st before water based poly. it's so easy you can glass with poly blindfolded. sanding is somewhat necessary and even easier than painting the poly on. well brushed poly dries very smooth. for even faster and smoother fill in keep an extra can of poly for adding talcum to.
no mixing, no fumes, no paint thinner or acetone, no product waste due to dried out leftovers, no scrapping or blotting the excess, water rinse your brush and 20 min dry time. oh and cheap too. i'll stick with the poly.
a 60 sized plane (fuse and wing) can be glassed, poly'd and primered by lunch if you are of a mind to.
david