How best to clean new marble floor before sealing?

[sonny red]

I'm getting ready to lay my marble floor and obviously want them to look their best.
The tiles are still in a wooden crate so quite dusty, the tile sealer I've got is Dry Treat Stain Proof but am wondering what would be best to use before I seal them.
Just a wipe down with water or chemical cleanser?
Also once I have sealed them how do I keep them looking their best? I do have a rotary polisher for doing paint correction on my car could I use that to buff up or apply products?
These are the tiles I'm using:

Thanks

 

[White Room]

A wipe over with clean water as you lay

 

[enduro]

The best way to keep them polished is to get some twister pads and a rotary polishing machine.