Clear polyurethane creates a beautiful, super-tough, armor-like finish that shields table tops and other wood furniture from scratches, stains, scrapes, solvents, moisture, UV, and weather damage.
Polyurethane coatings are much easier to apply and are more durable for daily use than traditional marine spar varnishes. Here are some guidelines that can help you make the right choice between oil-based and water-based polyurethane coatings—both are very easy to use to bring out the beauty of your table top.
Cost-wise, water-based polyurethanes are a little more expensive, but people generally choose them over oil-based poly for three reasons: clearer color, faster drying time, and low odor. In addition, water-based polyurethane formulas have improved to the point where they are almost as durable as oil-based polyurethanes.