In some cases, it might be necessary to remove a large layer of the surface. For example, a scratch that is 10 microns deep. Polishing might take an hour or longer to fully polish away. Wetsanding can do this much faster with better results. Another example would be the removal of orange peel. Wetsanding will remove a layer in a different way then polishing, giving us new possibilities in affecting the surface of the object we are working on.