ORIGINAL: Ilikebipes
Glue the skins together.
Sand smooth.
Spray hairspray on the glue side of the sheeting to seal the wood. It will not get absorbed into the wood this way and you will save weight.
I'd use finishing resin. I'd apply it to the skins mixed in a large syringe in 1 inch squares (I don't want it to spread more than 1/4'' in width once the sheeting is set with weight.
Line joining areas with glue.
No, the entire surface will not be spread with glue.
Finishing resin gives you more time to work.
You could cut out lattice work in the foam core, but the foam is VERY light and not as much weight savings by cutting the foam as when you use this glue method.
Brian
Ok, you had me up till you said you dont want the entire area to be covered in glue. the whole reason for doing it that way is to keep it from rising up after its finished. Also, hairspray???? LOL. the main reason for using epoxy is because epoxy will penatrate the balsa a tiny bit to get a hold on it to ...hold it down...does not make any sense to keep the epoxy from sticking to the wood to save weight. I do 52" wing panels. I use a total of maybe 2 oz of epoxy to do both top and bottom. That would be 4 oz of resin for 108" of wing. I doubt weight would be an issue in the context. I know the original poster is not doing a plane that big, but, even if he did one at 60", that would still be only a tad over 2 oz of resin. So I got to say, I dont know where you got that idea, but, I believe your over engineering and going on flawed data to support your idea. Hairspray??? LOL really??? Im sorry man. Im just setting here laughing at that one.
Stick with tried and true. Epoxy, spread thin as you can. Weight it down on a flat surface, you got your wing sheeting done the best it can be done.
WBG