I was given a game that had a similar playfiled with lots of touchup and cracked clear. A friend got it in a trade and when he really looked at it, he was so mad he just put it the corner for years. I sanded off as much of the cracked clear as I could and hit it with 5 coats of verathane (foam brush..which does not leave brush strokes if done properly). It might turn out better than you think, and the end result will at least be smooth.