A self-leveling" custom formulated, polymer modified, cementitious "micro-topping" is what professional's use to achieve a dense smooth surface (without trowel marks such as the ones that can be seen on your photo). This material is not stocked in places like Lowes, Home Depot, Builders Square, etc. ...but, "micro-toppings" can be ordered from several different manufacturers or can be acquired (shipped or picked up) from local/regional decorative concrete material supply houses (their specifications/technical data sheets will state that they are acceptable for use as a wear surface topping that can be stained, dyed, integrally colored, etc.; in other words for "self-leveling micro-toppings that specifically state they can be used for decorative concrete flooring/resurfacing purposes" ... some of which are: Ardex STD, Mapei Ultratop, Concrete Coatings Micro-Tek, and Duraamen's Param (among other's).
