I have a little experience with sheeting foam wings with balsa. Before I moved I was working on an Ace simple Mustang that I got as far as the sheeted wings before I had to pack it up.
I got foam cores for this guy and I wanted to try something new. On the Mustang I used Pacer Z-poxy and it worked pretty good, it was light and easy to work with.
I had been hearing a lot about Elmers Pro-Bond and 3m Super 77, I have a few more kits on the way that have foam wings so I want to get some method down.
First I tried the ProBond and I was happy with it at first, it seemed to spread well, and the fact that it needed a little bit of moisture to bond helped in bending the balsa into place. I left it to dry overnight and when I came back I had found that the glue had foamed up while drying and it made hard globs of dried glue running all down the edge of where I had stopped. Now I cleaned up all of the extra glue and was very careful not to leave any on the foam or elsewhere. This totally came out from underneath it. I put the probond away at that point.
Since then I have been using the 3M Super 77 and really liking it. It cleans up really easily with paint thinner, it sprays on and if you let it tack first, it sets pretty quick.
Cleaning up the mess from the probond has proven to be a pretty tedious task, it still looks pretty sloppy to me, hopefully when it is all sheeted it will turn out OK. I'm gonna have to practice with that a little bit before I go spreading it all over again.
I am using the LE/TE/Cap Strip method, the bottoms are fully sheeted. Here is a shot of the tops
Check out the Craftsmen Scroll saw in the background, 8 bucks at a yard sale last weekend