What happens if you dont sand between coats of polyurethane?
If you do not sand between coats of polyurethane, the polyurethane will become brittle and will not bond well to the metal. This will cause the metal to rust over time. How many coats of polyurethane are waterproof? There are several coatings ofpolyurethane that are waterproof. The most common is a urethane coat that is ... Read more...