I will just say this, you cant hurt it! Whatever you stain or seal can always be removed if need be. If its not a collector or valuable to you, go for it. Sand the ENTIRE bow down clean and smooth, glass and all. Hang it from some fishing line and spray it with Minwax spray poly satin. Give it a coat every two hours. I would go no less than 3 coats, dont sand between coats. You will like your outcome.