Gluing Walnut over Polyurethane? by Reader Submitted • Nov 4, 2008 Print Print I built an oak trunk, finished in polyurethane. Can I glue walnut strips over the polyurethane with Gorilla Glue and expect them to stay fastened? Helen Patterson, W. Patrick Edwards, John Brock, and Sandor Nagyszalanczy: No. Use screws.