What technique do most painters use when hand sanding?

The technique that most painters use when hand sanding involves applying water as a lubricant, often in conjunction with a rubbing block. This method, commonly referred to as wet sanding, serves to minimize dust and improve the quality of the finish. The lubrication from the water helps to reduce the friction and heat generated during sanding, which can lead to smoother surfaces and more consistent results. Additionally, wet sanding helps to prevent the sandpaper from clogging, allowing it to last longer and maintain its effectiveness throughout the process.

Using water not only aids in achieving a finer finish but also helps in identifying imperfections in the surface that may need additional attention. A rubbing sound block provides a stable surface to apply even pressure, enhancing the control and accuracy of the sanding process. Overall, this technique is favored in the industry for its effectiveness in preparing surfaces for painting or refinishing.