What is crucial to do when performing scuff sanding on a rough surface?

When performing scuff sanding on a rough surface, it is crucial to thoroughly sand where the surface is rough. This means taking the time to address uneven areas properly to create a consistent surface profile. Scuff sanding serves the purpose of enhancing the adhesion of new coatings or finishes by creating a key or anchor for the material to grip onto. If the rough areas are not adequately sanded, it can lead to poor adhesion, which may cause issues such as peeling or flaking over time.

This methodical approach also ensures that the entire surface is prepared effectively, contributing to a smoother and more even finish once the new layer is applied. By focusing on the rough spots, you help to achieve optimal results in the refinishing process.