Hey Dean, A work bench does not need a finish! A work bench gets used and abused and the finish will be the first thing that gets abused. When I built my work bench many years ago I applied Danish oil to it just to give it a finished look, but no topcoat. If that's all you want to do, I would us a 50/50 mix of boiled linseed oil and mineral spirits. It wont protect the bench, but will give it a finished look.