How to Apply a Stained Finish on Open Grained Hardwood Examples: Oak, Ash, Mahogany, etc. How to apply this finish: 1. Sand the project up through the grits until at least 220-grit. It is a good idea to sand pieces that will be hard to reach before assembly. 2. Wipe the project with mineral spirits to check for glue splotches 3. Apply a good quality Oil Pigment Stain, dry 24 hours (Oil stains are easier to apply) 4. Use a good quality urethane top coat finish. Flood it on, let it sit and wipe it