thanks how2girl, but I guess my question is more about polishing concrete that has been sealed/oiled than it is about concrete benchtops (hence those threads were a bit generic). A bit more research suggests to me that a sander is the tool to use. I'm thinking of attaching some used carpet to a sander. I'm still unsure of whether to use a polishing cream - I think it perhaps can't do any harm though, and may add to the shine. Then the question becomes whether it makes sense to add bees wax over the top. To me, it seems it would protect the shine. But I'm guessing all of this.

Sorry. I have not. But here's a picture if this is the one you mean... It looks like a good mix of earthy tones and some greys that might pick up other elements in your kitchen or dining room.

Look at the range of timber bench tops at Bunnings. Nothing better than a timber look, with real timber. https://www.bunnings.com.au/our-range/kitchen/benchtops/timber

Yes, if you check the Caeserstone website they say; " As Calacatta Nuvo™ incorporates large veins with some small unique natural variation between slabs, we encourage those of you that select this design to view your actual full slabs first hand at the stonemason prior to them commencing fabrication." https://www.caesarstone.com.au/colour/5131-calacatta-nuvo I am not sure if your product is from Caeserstone or a competitor, but most manufacturers have a similar disclaimer with their veined reconstituted stone as there is variation between slabs as you have discovered. If you were selecting from real Calacatta marble from Italy you would definitely check the slabs before delivery as there is always variation in natural material. I suppose the question is - who checked the slabs? Or did you just order for two to be delivered, assuming they would be the same? Best of luck, Dr Retro of Dr Retro House Calls