There are at least four types of Gorilla glue and each has there place in modeling. I'd use epoxy though on any firewalls where glow fuel is apt to be spilled or contacted. Their wood glue is an aliphatic which is similar in acceptable applications as is Weldwood or Titebond. I've never used their instant glue but have found the foaming ones (both the white and the brown) to be very good on many types of application, especially on foamies.