If you want, you can get a small plastic tub of the vinyl resin enhanced patching concrete (less money; for thickness of 1/4” or less) or the patching concrete (more money; for thickness of 1/4 to 2”) and patch the holes… These types of concrete do not have aggregate. You could probably just remove the aggregate from a bit of your high strength concrete and see if that works. I’d probably mix this second “coat” a little more wet than you have here… it will smooth out easier.