That type of composite material typically has compressive, not tensile, strength - can be described as less "rigid". If used in an application that requires some tensile strength, could be a problem. I hope that is not your situation here, and expect you understand these materials, just thought I'd throw it out there.
Great looking dash, I have often thought about building something like that, but other things always come up. I will keep yours in mind though, thanks for sharing your project, with pics!