Don't forget, putting a print behind any surface or film is more important than UV filtering per Canon's own information. But everyone concentrates on UV. The Chromalife 100+ inks are rated far longer on UV than they are gas fading. Thirty years vs. ten, something like that.
Glass, acrylic, or shellac. At least the latter for less important prints, especially hanging naked. Hmmmm.....sounds kinky.