To mimic her low-cost creation (expect to spend roughly $30 on supplies), you'll need Krylon Looking Glass Silver-Like Aerosol Spray Paint, a spray bottle with water in it, and painter's tape.
Next, Mia went over the wet glass with a thin coating of mirror glass spray—she recommends Krylon Looking Glass Spray ... on a couple more layers of spray paint and vinegar spritz, blotting ...