I always thought chroming a wheel required special attention/equipment, in that the way the current flows to the nearest surface, a problem with a deeper? dish wheels, to get even plating requires special fixtures?, this is obviously not my speciality, and you would want to make sure the plater has wheel experience/equipment/something similar to show their quality of work.
I tried to get some redone a couple three decades ago. Hydrogen embrittlement was the concern. There were some quality issues that weren't show stoppers, but embrittlement was. You might look into the chrome paint as an alternative?
