Ok guys,i'm gonna add a little fuel to this discussions fire. I've used all of the products mentioned in this thread,and from personal experience i can say NONE of them work as good or as fast as 3M 77 spray adhesive! With all those other products you have to worry about drying time,the panels warping or moving the sheeting and you cant touch them for 12 to 24 hours. To SLOW for me! With the 3M spray,i just cover the foam and skin in a thin coating,let set for a smoke break ( 5 minutes) then line them up on the leading edge and roll the foam onto the sheeting! Bang! one sides done,i do the other and in less the 20 minutes,both wing halves are fully sheeted and i start putting on the le and te stock. In about a hours time,i have 2 complete wings ready for covering! And as some of you are no doubt going to say,well in different climates that stuff will come lose or warp over time. Well i'm here to say,i've lived in colder climates ( up state NY ) and hotter ones ( south TX ) and have NEVER had any sheeting come apart or bubble up from the foam. The only down fall to the 3M 77 spray is this, MAKE ABSOLUTELY SURE you position the foam on the sheeting EXACTLY where you want it! you only get 1 shot at it,cause if you miss,you AIN'T GETTING THEM APART for a second try!

Good luck all