Hi, I cant believe that searching the web I could find nothing but forums discussing about boats and kayak stuff, but I have other problems with fiberglass. I recently cleaned up my fiberglass balcony using only a brush and a garden hose, and I uncovered about 6 or 7 small hairline cracks. Obviously, I am worried about water going inside the balcony and rotting the plywood core which will require replacement of the entire 12x12 balcony ($$$). Are there any techniques, products or methods to fix these cracks for good? The structural integrity of the balcony seems intact so I sure hope its only cosmetic for now but I dont want the issue to evolve into something I cant manage. Anybody?