My only experience with "bar top coating" is a product called Envirotex. It's a two part epoxy and I used it to clear coat musky lures. It is tough but I found over time, once any water got under an edge, it would tend to lift and crack off in pieces. In fairness, my coating was over painted on surfaces and there were always small places for this to start: hook hangers, line ties, hook rash or tooth damage.
I've got one in the shop right now I stripped to the wood and "painted" with some thinned clear first. My thought is if I can get it to actually soak into the wood, paint and then add another coat of clear over the top I can minimize the eventual damage. Only time will tell its durability.
Be advised: it is a bugger to remove the still adhered areas to refinish.
Maybe another option for you is to go a plastic route. My first ice sled was made of plywood with a piece of one of those poly blue barrels (they also come in black or white) for a bottom. Never gathered ice or froze down and was crazy tough over gravel roads and asphalt parking lots. Kinda like the UHMW for modern ice sleds except not as think but way less expensive. It would also be easy(ier) to replace if necessary.
