How to Make a Coat of Polyurethane Shiny

Polyurethane comes in several sheen levels, from flat to glossy. If you have an item whose polyurethane does not have the desired level of sheen, you will need to top coat your item with a high sheen polyurethane in order to increase the polyurethane's shine. Polyurethane comes in oil based and water-based forms. The oil-based polyurethane is far more durable than the water-based kind, but it takes significantly longer to dry, has an unpleasant odor and needs solvents for clean up. The water-based kind cleans up easier, and it drys quickly. However, it is not as durable. If you are looking for a glass-like sheen, choose the oil based polyurethane. The oil based polyurethane's longer drying time will allow any brush marks to smooth out naturally, using gravity, before the polyurethane dries.

Things You'll Need

• Fine grit sandpaper
• Glossy polyurethane
• Soft cloth
• Paint brush

Instructions

1. Sand the item lightly that you wish to fix. You may either sand by hand or use a power sander. You really only need a bit of sanding to rough up the old surface to encourage good adhesion with the new polyurethane. Also, use this opportunity to sand out any bubbles, bumps or scratches in the old polyurethane.

2. Wipe any sawdust off completely with a soft cloth. You may moisten the cloth if it seems helpful.

3. Use the paintbrush to apply a coat of shiny polyurethane. Apply the polyurethane following the direction of any wood grain, and be sure to make the coat thin and even to prevent drips from forming while the polyurethane dries.

4. Allow the polyurethane to dry according to manufacturer's directions (one day for water based polyurethanes, longer for oils)

5. Lightly sand again and remove any dust particles.

6. Apply another coat of glossy polyurethane. Allow to dry thoroughly before using the piece.

References

• Fixing the Sheen on Polyurethane