We have troweled concrete and seal it every year with Glaze ‘N Seal Multi-Purpose Clear Sealer. It is only a little slippery in the day or two after it is sealed; otherwise it is fine. It is troweled to not have any big gaps so as not to be a trip hazard. You can see it here in the hardscape around the coping which is plain concrete blocks. The pool and concrete were about 6 years old when I took the picture.

Richard