28 Ways to Refresh Your Bath on a Budget
9. Brighten Tile
Refresh a vintage tiled floor, such as this unglazed Art Deco–era yellow-and-black porcelain mosaic, with an eco- and homeowner-friendly acid etcher that removes ground-in dirt from the surface and grout lines.
Green Envy Muriatic Acid Replacement, about $7 per gallon; grainger.com