Waterproofing a Wall
The best way to make a tinted wall waterproof is to first use a material composed of cement properly tinted and with no glue in it—one that will not require a glue size on the wall. After this coating of cement is applied directly to the plaster, cover it completely with water enamel and, when dry, give the surface a thorough coating of varnish. This will make a perfectly impervious covering, which steam, water or heat will not affect.
Contributed by Julia A. White, New York City.