The patio and coping around our pool are concrete. Poured in 2011. The coping has become quite rough from the water splash and aggregate is exposed. Anyone climbing out of the pool gets skinned knees. The patio area is all rough concrete, the texture of an old sidewalk or driveway. Is there anything we can do ourselves, or hire someone to smooth it out some? What product or process would you recommend? Google searches have turned up 'resurfacing,' 'sealing,' and 'coating' as possibilities.