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As long as your walkway isn't cracked all the way through, you can coat the slab with a concrete resurfacer, a no-shrink blend of Portland cement, sand, and polymer additives that fills divots and makes a uniform finish. Its natural color is dark gray, so buy enough to cover your entire walk. One 40-pound bag coats about 35 square feet. If you want a different color, just add a concrete tint. Before resurfacing, strip off any paint or sealers and watch the weather. Temperatures should remain above 50 degrees F for 8 hours after the pour and above freezing for 24 hours after that.
The cost to resurface a concrete slab can vary quite a bit. Basic grey cement color over a fairly good condition of concrete could be as low as 2.25 per square foot whereas an intricate pattern, multicolor and borders can run you in the price range of $4 to $8 per square foot.cid stain: Sometimes referred to as acid etch, acid wash or acid washed concrete, patina stain etc. This system is used to add a permanent color to an existing or freshly poured cement topping or concrete slab. Prices can range from $2 per square foot to $7 for a basic application.