We recently inherited a beautiful 1950s mahogany dining suite from my mother-in-law who was a very heavy smoker. She kept a lace tablecloth on it for years, and once removed, we discovered a "pattern" etched into the tabletop finish; where the holes were in the cloth there is now a dull finish. The stain in not compromised, appears the damage is only to the finish. The rest of the table and sides still have a beautiful shine. There is also a cherry secretary where the finish is "dulled" in places, we believe from the smoke, too. We used oil-based polish and looked good for a day, but then the dullness returned. Any suggestions short of refinishing the pieces which we do not want to tackle? We've thoroughly cleaned & polished both, but didn't really affect the finish issues. Tung oil, linseed oil, lemon oil have any effect? Many thanks!