I saw an "Emporite" table in a store yesterday, its like a polished
woodgrain finish - and I think it would be extremely susceptible to
scratching.

Its approximately 1.5m x 900 mm so its a standard kitchen size - just
wondering what to cover it with to ensure it doesnt scratch when not in
use - a thin sheet of plastic perhaps? A tablecloth would defeat the purpose
of having such a nice table...

And are they polish-able when and if they do scratch slightly?

thanks/