Frequently asked questions about polishing concrete floors
Concrete is porous so unless a sealer, be it acrylic, polyurethane, epoxy or GTA hardener is used then the natural porosity will be susceptible to staining and scratching.
Grinding or honing is the process that removes the surface layer of concrete leaving the aggregate exposed to a smooth, matt, low maintenance finish.
Exposure is the amount of aggregate (rock, quartz, pebble etc) that is able to be seen as a result of the grinding process.