OEM Campagnolo wheels are magnesium. Magnesium can be polished but it will immediately begin to tarnish. It has been done but is not a practical direction to go and you will have never-ending upkeep duties.
If you are looking for aftermarket aluminum replica wheels, then yes they can easily be polished and do not require the constant maintenance that magnesium would require.
So, can you please clarify exactly what you are seeking?