Replying to Sick funbox setup

So I've been thinking about this for a while and never thought to bring it into light. So my dad owns a boat busines so I'm always working on boats with him throughout the summer. So we have a couple scrap boats that are rotted out but the bottom is still in good condition. I always thought to myself, wouldn't it be a sick setup to set this up as a rail/funbox? I know in the traveling circus will hit a metal boat as a feature but what about a 22ft fiberglass boat? I don't think my edges would get caught up on the fiberglass and I could put a coping over the v, something to grind on the top of the boat. I wanted to know if you guys think this would work, or would my edges immediately sink into the fiberglass? Fiberglass isn't very soft but over time of course, it will wear.