had a very thin layup, not over 1/8 inch. And up high on the hull, below the end caps, the weave pattern showed through the white gelcoat.
Quite possibly you have a Kevlar boat, but remember that replacing fiberglass cloth layers with Kevlar really does not make for a stiffer boat. Glass is plenty stiff, and glass outer layers contribute more to stiffness than Kevlar outer layers.
Kevlar's main role, used for inside layers, is to protect against propagation of tears. Kevlar is very tough. It is very strong in tension, but if you make a tube out of Kevlar, similar to the carbon tubes used for high end paddles, you'll find that Kevlar is no better than glass in compression. Early attempts to use Kevlar for paddles were failures.
Free Standing Boat Racks
Heel and Pegpads™