Sir, are your questions pertaining to the mock-up or the product in fiberglass?
Cardboard as we all know flexes, but once you get the shape as you want, you can add bondo to cover any creases and maybe fiberglass the interior so the cardboard will retain its shape. You then can give it a shot of paint to see any flaws, etc.
Adding flanges before molding will also stiffen your mock-up so you can accurately mold your mock-up.
Yes, there could be a chance of cracking.......but mock-ups are not meant to last very long. Once you're done, you should have it molded. All our mock-ups gets busted up after they are molded. But then, you already have the mold.
As for fiberglass products - they are indeed flexible. You can use flexible resin when you lay up fiberglass to add more flex. Naturally, a thinner lay-up of fiberglass would yield more flexible compared to a thicker lay-up which would be stiff.
You can flex fiberglass to a degree and it always goes back to its original form.
Mardon (MLC)
mlcallanta@yahoo.com
