Do you already have a plain gray concrete patio that’s in good condition but not very exciting to look at? You don’t need to rip it out and start over to upgrade its appearance. Resurfacing with a cement-based overlay or microtopping is a great option for adding a decorative touch to an existing concrete patio while covering up minor flaws and discoloration. After the overlay is applied to the existing concrete, it can then be stamped, stained, stenciled or engraved to add color or simulate the look of brick, stone, tile or slate. Before beginning a concrete patio resurfacing project, be sure to consult a professional to determine if your patio can be resurfaced successfully. If the concrete slab is settling or is badly cracked, resurfacing may not be a viable option.
Source: Resurfacing Concrete Patios