When pulling up carpet installed on a concrete slab, the wooden nail strip tracks often pull up sections of concrete and some of the concrete flakes off. I want to install an engineered floor on this slab so would like to repair this first. The good thing is this is limited to the edges of the room but those missing flakes could cause leveling problems. How would you best repair this? I was thinking of using some grout to smooth over these areas. Also would you fill in all the nail holes left behind?
Edit: By flakes I mean large chunks pulled up between the nails, some 5 inches long and 3 inches wide.