Between my Dad and I, we probably keep goop in business. My Dad introduced me to it as he uses it for many things in Sailboats (full size, not RC). He loves to restore old boats buy, especially sailboats.
Myself, I use it for model aiirplane windshields, formed fairings, parkflyers, kids toys, heck, it di a great job on a cracked weedeater gastank! I picked up another tube last week. It is heavy, so go lightly on the planes, it doesn't take much anyway.