I broke off the nose of my F-22 yesterday, and thought I'd document the repair. EPP foam is great for this kind of disaster. I applied the Foam-Tac to one surface, mashed and unmashed the surfaces together, let dry for a few seconds, and made the final join.
In under an hour the joint is firm. I think the directions say to let it cure for 24 hours for maximum strength. As you can see here, it's nearly impossible to see the repair line.
Here's a video of the process. Made with my new downshooter!