Ok, since I'm fixing an existing project, rather than starting from scratch...
I have two areas of significant foam damage, where I cut the damaged foam out & am making through-and-through patches (the base of the rudder, and the center-section of the pilot-side elevator)... Due to the thickness of the foam I have, this means laminating 2 or more layers of foam together horizontally , to make a patch.. What is the common method for sticking multiple layers of foam together? Is there any issue with using 3M spray-on contact cement to attach horizontal sheets of foam to each other, then epoxy around the edges to attach the assembled patch to the existing structure? Or should I just epoxy it all together? The reason I was thinking 'contact cement' is it's a bit less messy & quicker drying than full-on epoxy (which I will be using for final assembly)...