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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.
Applying a uniform coat of coloured concrete will cost less than more decorative treatments such as: Since every job is different, the only way to find out how much concrete resurfacing will cost you is to get quotes from concrete resurfacers in your area and compare them. Before you do, though, have a look at our paving design ideas photo pages.