You can rub the plastic down using wet and dry and then polish it, but the clocks would have to be out the car to do this
I wouldn't use wet & dry...but if you find a local 'Detailing' guru with a polishing machine, I'm sure they'd cut out with some very fine finishing compound and a few minutes work.
Plastic front and real lights polish up like new, so instrument cluster 'glass' should do too.
You'd need to get it off the car...but I'm sure a competant detailer would have it like new in minutes.