I found my grandfather's old skiff (possibly Johnsen?) in the trees, in the back yard of my grand parents house after they passed away a few years ago. It has been there at least 25 years, and has trees growing around it, 2 feet of leaves, dirt, & plants growing in it. The outside looks solid, with no holes in the bottom or sides of the hull. The inside benches are starting to delaminate. When I push down hard on the rolled edge of the side, I hear slight cracking sounds. Can I just clean it out, put a couple of layers of glass on the inside and call it a day, or is it too far gone?