Yes, it will work on fiberglass, especially corvettes. Lizard Skin say's the sound dampener or ceramic will work on just about any material, as long as it is applied to the minumum thickness (about the thickness of a credit card). Glass MUST be clean, no road dirt, oil, etc. New glass must be scuffed up. My dealer in Florida recommends going over everything with a scotchbright pad, but any similar method will work. I have not used it yet, but have purchased it (both sound dampener and ceramic and their spray gun) and will be applying it as soon as the glass is ready.
Here is a link for Corvette Fever listing Lizard Skin in their "The '10 Corvette Fever Vette Rod Source Guide"
http://www.corvettefever.com/techarticl ... erica.html
Another site, look at this web site of a 77 convertible restore. They used it and shows pictures of the inside as well as the bottom.
Here is a second site I found. He says somewhere in the middle of the list of photos he is using Lizard skin, and shows what looks like it installed.
http://www.1-4u-computer-graphics.com/c ... 3646387/90
A third site is a C2 restoration at the "Corvette Center" in Connecticut (I've been there while I was stationed in Connecticut in the Navy). They use Lizard Skin on pretty high end restorations.
http://www.richsclassiccorvettes.com/We ... ject.shtml
There are many more sites referencing Lizard Skin on corvettes, do a search on "Lizard Skin Corvettes to see more. Hope this helps answer your question.