How to Rub Out New Concrete Walls | Hunker
Apply the slurry to your new concrete wall by holding the trowel blade to the wall so the slurry is pressed onto it and wiping the slurry across the wall with a smooth arcing motion. Evenly coat a 2by2foot area; this is a good size area to work in so the drying of the slurry does not go faster then your ability to rub out the wall.