On glassing:
While the peel-ply approach is a definite and required technique, I've learned about the magic of epoxy and alcohol. I like to think of alcohol as an epoxy tamer so to speak. When using epoxy (typically laminating epoxy but long dry epoxy can be used too with almost similar results) for a wing center section, I typically paint thinned out epoxy over the cloth in several layers after wetting out the center section. Depending on the thinness of the adhesive, the layup comes out to be very smooth and glass like.
In doing the center sections, I typically start with heavy glass cloth and proceed on to light glass. In most cases I'll go with 6 oz cloth followed by 3/4 oz cloth but in some cases I'll use 2 oz cloth in a third intermediate layer or sometimes will avoid using 6 oz cloth when weight is critical. The size of the cloth of course changes depending on the layer and cloth weight involved. Regardless, I like to finish with 1-2 layers of 3/4 oz cloth which produces the top glass like finish.
I've found that when using this liquid paint on technique, peel-ply is not required as it produces very good results. The trick is in making sure that the solution is thoroughly mixed and blended as epoxy and alcohol tend to want to separate. Of course, the alcohol evaporates quickly as the epoxy cures and all that's left is the smooth glassed surface. I also often use a Bondo scraper to remove any excess adhesive and to thoroughly wet the cloth.
David.
David, can you clarify one point? What type of alcohol do you use, denatured or isopropyl? Or does it really matter which you use? I've never been clear on which should be use for thinning epoxy.
FB