Dave,

the technique we have been using is to final sand the airframe to 320 grit.

brush or spray a coat of balsa-right to seal the wood.

sand the balsa-right with 400 just to get the fuzzies off and smooth the texture.

using 2 oz cloth do the fin post and pipe tunnel with laminating resin thinned up to 50% with acetone. lay the cloth in position and paint it with the thinned epoxy, then using a foam roller, roll off the excess epoxy, then using white micro ballons dump a small hand full of the ballons onto the area your working and rub it into the epoxy with your hands and fingers. it will suprise you how easy this is.

let cure and trim.

using .5 oz cloth do one complete side of the fuse, with about 1/2" overlap over the cowl. use the same thinned resin and micro ballons techique, let cure and trim.

repeat on the other side of the fuse.

when finished hit it with 320 grit and brush on the first coat of primer, when dried sand it completely off and spray on a second coat of primer, sand and then work on any pinholes with more primer until your glassy smooth. look back a page and see my v2.2 that I started painting. you will see that you can sand off most of the primer before you do your base coat. almost all of the weight comes from the primer.

that is it. you just want to make sure you get good but thin coverage with the resin before you apply the micro ballons....

I am about to fiberglass and paint 2 planes and will be outlining the steps again with photo's