It depends on the condition. If there are just a few nicks etc I would lightly sand with 200-320 grit or 0000 & 00 steel wool, wipe off all dust & spray with minwax spar urethane satin or gloss or krylon crystal clear acrylic spray.
If you want to completely strip it to bare wood, 150 grit to, 200,320,400 etc then apply your choice of finish. If you choose this route do not significantly sand into the fiberglass as it may change tiller & draw weight.
If you have oily woods then seal them first with shellac or ca glue so the wood is sealed & the finish will dry.
Post pics if you can. Good luck & have fun.