Step 6: Good As New!!
It's really that easy! If you can build a foamie you can fix a foamie and as long as the plane isn't totaled it's usually easier and faster to fix it than to build one from scratch.
Although mine isn't painted (yet) this would be the point where I'd pull out my airbrush and match up the paint scheme but that's another story..
Remember, if you can't open it you don't own it and if you can't fix it it's not broken - good luck!