Just saw this string...Did you get the information you needed on this? Reason I ask is because in your first post you mention counters but in your last one you mention the dinette table. For a dinette table surface that will drop down into a bed I would not suggest Corian..would crack I would think, but Corian on plywood may work, but even better would be a nice piece of 3/4 furniture grade (higher ply count) plywood and formica on the top and edges (or hardwood on the edges even better).
Curt & Susan 2009 38' Newmar Grand Star 3752
Front Engine Diesel - Freightliner Chassis Cummins/Allison
Toad: Honda Element ("LIL HUM"), Ready Brute tow bar/braking, Protect-a-Tow