Door varnish which " blooms " or turns white in wet weather, probably was left uncorked for some time, or had been stored in a damp, cold place and become chilled before being applied to the door. If the defective varnish on the door is sufficiently hard, it should be " flatted " - that is, rubbed down to a dull level surface with second grade pumice-stone powder and water, using a pad of horsehair, hair cloth, or canvas. Swill off with plenty of clean water, then in warm dry weather apply a coat of varnish of a different brand from that previously used.