Papier peint sauge Daisy-Lyn Laura Ashley

I’m restoring a 1914 home. I used this wallpaper in a main floor half bath that I transformed into a full bathroom. The wallpaper matches the subway and octagon tile perfectly, along with the repurposed original wood trim. My only issue with this wallpaper is that I wish it had a protective layer on it as I’m worried about damage with time. I’m researching products now that I can use to clear coat the wallpaper to protect it.