I find deft as strong as any other way of laying down glass. I only use it with 1/2 oz and 3/4 oz glass though. If I'm going glass a center section on a wing with the thicker glass I use an epoxy. Any surface to be glassed should be as clost to perfect as you can make it because it will show up every bump or dent. Looking at a plane glassed with deft and light glass it looks like raw wood. I found a section where I didn't get the wing sheeting glued perfectly and missed it when filling the imperfections.
You slather on two coats of deft over the wood first then smooth sand. Then you lay on the glass as you would normally do but with a paint brush. I will put on from three to 5 coats, the deft gasses off and leaves behind very little weight. For the final coat I mix the deft about 50/50 with baby powder or talc. I let it sit for 24 hours then finish sand. When you are no longer removing any powder stop sanding! The finish coat is just to fill in any weave the deft didn't get. I usually only need three coats but I have had to go as high as four. Very easy to work with.