No worries – I did some research and chose
Nutech Pavecoat. I had a local guy do it (wanted about $700 for the job, including the etching AND the paint – couldn't say no!)
So far it's been good, hard wearing, cleans up well. I wouldn't be surprised if it needed another coat in 5 years. But yeah, I'd happily recommend it.
The colour is "Coral" – matched well to all the sandstone around us.