Is used to remove major paint defects such as fish eyes, uneven paint, and orange peel all of which are commonly seen in new factory paint jobs. In older paint it is used to remove scuffs, deeper scratches and defects that can not be removed by machine polishing. In most cases wet sanding for the purpose of removing deep scratches is avoided at all costs due to removing a significant amount of clear coat. Be very cautious of anyone who says they can remove a deep scratch by wet sanding or" buffing it out" this is a short term solution as within a few months it is very common to see that your clear coat will begin to fail in the area the "buffing" was done.