Fill a pump sprayer with concrete degreaser and spray it across the surface evenly. Once it has settled on the floor and broken up grease and oil stains for 15 minutes, brush the floor vigorously with a nylon push broom.
Rinse the concrete with a hose and then allow the surface to dry for 3 to 4 hours before continuing.
Move a wheelbarrow next to the site and fill it with self-leveling compound. Stir the compound thoroughly with a shovel and incorporate the included additive as instructed on the packaging.
Scoop the compound onto the floor on the sides of the high spots. Once applied, immediately spread the compound to a 1/4 thickness with a steel trowel. Once initially spread, the compound will move into the proper areas so the the floor is level. Wait 48 hours before sealing the concrete.