poly glue doesn't need air to cure, it needs water. In my area, the air is generally humid enough to kick off poly glue without any additional moisture. As some others have pointed out, you can mist the foam cores with water first.
Pictures are worth a thousand words....check out my website, www.flagcityflyers.com
. I detailed my build of my 35% Carden Extra. I vacuum bagged all the foam parts for that kit and took several pictures showing how I do it. (BTW, this plane now has over 60 flights on it, sitting outside all day long in direct sunlight and very high temperatures and still looks as good as the day I covered it.)
I bought a vac bag system from Aerospace Composites (http://www.acp-composites.com/acp-vbs.htm
)....I've got a little over $100 in the setup, including bagging material and other supplies. So far I've been able to reuse everything many times. (I'm now finishing up a Carden Cuda, and used all the same vac bags I made up for the Extra.)
Someone mentioned pre-gluing all the sheets before skinning the foam or the finish will not look very good. While there is nothing wrong with pre-gluing, I have NOT experienced any of the problems mentioned. I do not edge-glue any of my sheeting, and every part turns out flawless. After I remove the part from the bag, I simply trim the excess wood from the edges of the foam, sand flush, then finish-sand the surface of the part with 220 grit paper and it looks great.....even over tight curves.
I've attached a couple photos of my latest project.....the first shows the turtle deck of a Carden Cuda. This is a rather tight radius....turned out great from the vac bag. The second is a top view of one wing panel from the cuda. Again, straight out of the bag, trim the edges, glue on the LE, TE, root cap and tip block. The third is a view of the wing trying to show that the sheeting is smooth with no ridges or seams visible.
I didnt think you could use Vac Bagging with Poly Glue ( Gorilla Glue) as it needed the air to cure properly. I guess what you are telling me is that is not the case. Could you give me an outline of your method. This is my first attempt at sheeting let alone Vac Bagging.
Thanks in advance