Varnishes are clear, protective coatings applied to surfaces like wood, metal, and paintings. They enhance the appearance of the material by adding a glossy finish while also providing a barrier against moisture, dirt, and UV light. Commonly used in furniture and art, varnishes help preserve the beauty and longevity of items. There are different types of varnishes, including oil-based and water-based options. Each type has its own drying time and application method. For example, oil-based varnishes tend to provide a richer finish but take longer to dry, while water-based varnishes dry quickly and are easier to clean up.