I have to agee with Mooch. My Slide Rite was built in 1984(mine for the last 12 or so years). Many scratches and gouges and the so called "tines" have fiberglass showing in spots. I fish alot during the lower levels of summer and the fiberglass boat shines in those areas where you have to navigate every single exposed small boulder. The bottom of the boat has incurred many scratches and small gouges over the many years but no exposed fiberglass on the bottom. I even took it down(talked into it) a long rocky or small boulder-sized slide to the river with the paint on every boulder

Anyway Fishen Fool... your buddy needs to look into getting his DB bottom re-fiberglassed.
It ain't cheap but look into the shops around the fiberglass shops around Springfield(call Don Hill boats-I think he has the forms and knows the best fiberglassers).

Glass boats are light and tough. Just don't leave in the exposed areas of hot sun as it will oxidize the surface. Keep it waxed or polished during summer especially. My .02