Levetec: Concrete Polishers and Grinders concrete polisher, concrete polishing, concrete hardener,concrete sealer,concrete stain,polished floors,polished concrete,polished concrete sealer,concrete repair,concrete surfaces,concrete restoration,floor maintenance,grinding machines,coating removal,marble care,granite care,concrete grinders,concrete grinding,concrete polishing,concrete polishers,concrete grinder Surface preparation is key to a successful project, if you are putting down epoxy or polishing the floor to a high shine. 2010. Levetec, Redmond, WA, USA.