After performing initial coarse grinding with the metalbonded diamond abrasives, it's often beneficial to apply a liquid chemical hardener to the concrete to help solidify and densify the surface and provide extra protection from water penetration and staining. Hard concrete also produces a better polish.
Concrete grinding is usually considered a finishing, or refinishing, process. Concrete contractors often recommend removing concrete and repouring concrete if you have too much concrete to remove. We want to give you one added word of caution before you start grinding.