Although it wasn't on a bingo, I had good results with Epifanes Clear Gloss Varnish on my ball trough wood and pf sides. These areas get beat up by balls and mine still look new. Glossy & deep, but not that plasticized/embalmed look. It should work great on legs & rails and anything else.
This is professional grade marine spar varnish (urethane, tung oil & UV filters). It may be overkill, but if you're doing the work, I believe it's worth doing as well as possible. I do a lot of woodworking and I've noticed a definite quality difference between brands. You get what you pay for - it's awful seeing your hard work (MinWax) peeling off after just a few years...