Metallic accents on walls are a cool way to make plain surfaces more interesting. There are lots of methods for adding shine inexpensively— here are some DIY examples for inspiration. I might need to give these a whirl someday!
Above, stenciling with metallic paint at Memento Bracelet
Foil tape geometric pattern at Lemon Drop Life, inspired by Kara Paslay's tutorial
Gold contact paper dots in Oh Joy's studio
Dotted wall stamped in silver paint with a shoe polish brush by Alexandra Hedin
Lines drawn with a metallic Sharpie paint pen at Vintage Revivals
"Confetti" wall with gold vinyl stickers from A Place For Us