I use phenolic sheets instead of an epoxy base fiberglass. Yes that is a sample of polyurea that is also used.Hey thanks for these pics, I can't quite tell what exactly I'm looking at. In the second pic I'm guessing that is the XPS foam sandwiched in between the phenolic? Is that what the orange sheet is in the first pic? and is that a sample of the polyurea next to it? Am I correct in understanding that the phenolic is basically an alternative to epoxy and would still be used in conjunction with fiberglass or carbon or something similar?