I've painted the inside of a medicine cabinet before (super fun!), but lining it with paper or fabric is a great idea! (And makes it easier when it comes time to move from your rental.) My bathroom cabinet
Sunflower Carrara Thassos Tile, Transitional, bathroom, Sarah Richardson Design Stunning bathroom with white bathroom vanity with marble top, mirror flanked by antique sconces and Saltillo Imports Large Sunflower Carrara Thassos Tiles backsplash.