Blushing, a white haze over a large surface or an entire piece of furniture, is a common problem with old shellac and lacquer finishes. The discoloration is caused by moisture, and it can sometimes be removed the same way white spots are removed. Buff the surface lightly and evenly with No. 0000 steel wool dipped in linseed oil. Work with the grain of the wood, rubbing evenly on the entire surface, until the white haze disappears. Then wipe the wood clean with a soft cloth, apply two coats of hard furniture wax, and buff the surface to a shine.
Blushing can sometimes be removed by reamalgamation. If the surface is crazed or alligatored, reamalgamation should be used instead of steel-wool rubbing. If neither rubbing nor reamalgamation removes the haze, the piece of furniture must be refinished.