Carpentry and Woodworking - Low budget kitchen

I am remodeling the kitchen in my studio with a budget of next to nothing. I bought a piece of hardwood furniture grade plywood (4X8) from a friend who bought too much, and I was considering using it as a countertop for my kitchen. I know it's a kind of crazy idea, but it would fit perfectly with the industrial design of my studio, and I already have the piece. My question is 1) is this a stupid idea, and 2) how exactly do I finish it? I appreciate any input anyone has!

Wood is never a good idea where water is involved [sink]. I know a hardwood floor installer who used oak for his tops. If you do use the plywood make sure it is well polurathaned! Be sure to coat the edges and bottom side near the sink.