Like any other counter top surface safeguard should be encouraged to maintain appearance.
Too maintain the shine of the polished surface it is recommended to apply a natural wax and buff surface of the concrete every several months or when the shine fades.
Cutting boards should always be used when chopping or preparing food. Cutting will not affect the concrete but the concern is damaging the sealer. Hot pans on the surface should be avoided. Concrete is heat resistant, but the concern is damaging the sealer.
Trivets of stainless steel, brass or copper can be built into the countertops and used for hot pots.