French polish is actually a method used to apply varnish in which hundreds of thin coats of shellac (sometimes blended with other resins and oils, depending on the tastes of the varnisher) are applied with a solvent-damp rag. Although it is a rather delicate finish, more susceptible than other finishes to dings and scratches, French polish is considered to be the most desirable. Over time, when the finish becomes dull with wear, the shellac can be restored to its original luster by applying new finish to the old. It is wise to have an expert repairman who is familiar with the technique to do the job.