SQA National 5 Design and Manufacture Practice Exam

After applying the initial coat of varnish, it is essential to allow it to dry thoroughly before proceeding with any further steps. Once dried, sanding with fine sandpaper is recommended to create a smooth surface, improve adhesion for subsequent coats, and eliminate any imperfections or dust particles that may have settled during the drying process. This step is crucial for achieving a high-quality finish in the varnishing process.

Sanding helps to prepare the surface for the next coat, ensuring that it adheres well and contributes to the overall durability and appearance of the final product. Properly executed, this technique enhances the finish, making it look more professional.

The other options do not align with best practices for varnishing. Applying an additional coat immediately without allowing the initial coat to dry can result in issues such as bubbling or an uneven finish. Skipping sanding if the surface appears smooth disregards the fact that even the most polished surfaces can sometimes benefit from light sanding to enhance bonding. Cleaning the surface with water is not appropriate as it can introduce moisture into the varnish, potentially leading to problems such as cloudiness or peeling.