Egg table question

Yes, I know there's a place other than here (egg table forum), but if you're like me you rarely go there and I sort of wanted to cast a wide net. My apologies.

I'm considering building a new built in on my deck for large and yet to be aquired small. I want surface to withstand a hot platesetter (so any wood is out) and after living in FL 20 years I've had enough dirty grout. Granite would be too fancy. I'm considering doing it in wood, but use copper flashing on top, bent around the edge (has added benefit of waterproofing for drawer built under the top). It comes in 3x10 sheets, so one piece would do it. I think the copper patina would sort of be cool and, well, different. Anyone ever tried something like this?