Do a Google Image Search for "Fiberglass Bicycle". You will see some Bowden Spacelanders, a couple pictures of my Daughter's "Fiberglass Ladies Bicycle" and Robert Eggers' Cadillac bike, shown above.

In case you haven't seen Mellisa's Fiberglass Ladies Bicycle, here's a picture:


I know a lot more about Plastic "Composites" than most people, on account that I built several Fiberglass Bicycles. Yet, I would use a Chrome/Molybdenum front fork, If I was to build a Carbon Fiber Bike. Also, I have recently shopped around for a rear "Trailing Arm" , Fork, and would probably buy one from the Quest Recumbent Bicycle company, if I were to start building next week.

I hope you realize that this bike plastic is secured to the frame/headset/BB shell, by internal "Lashing", which is embedded with resin, so as not to come unwound.

Good luck with your DIY project, I hope you have found my advice helpful.