How to Sand Concrete Countertops and Fill Micro-Pinholes (120–800 Grit Slurry + Sand Workflow)
Even perfectly cast concrete countertops develop tiny air bubbles—micro-pinholes that catch light and trap stains. The professional fix is a simple one: make a cement-slurry paste, spread it thin, and sand through the correct grit sequence to a sealed, matte,...
