water-dispersible oils are on the market which effect better dispersal of the oil throughout the water.
The paints resulting from either vehicle are equal in quality. Cold-water paint is applied to clean,
masonry surfaces, such as concrete, brick, wet walls, and so forth. Masonry surfaces should be
uniformly dampened (not wet) before the paint is applied. You may also use the paint on clean, primed
wood or metal surfaces.
(13) Black oil-based paint. This paint is a glossy, slow-drying paint that is used for final coats
on the surfaces of exterior wood, masonry, and structural steel. It is durable and has excellent hiding
qualities when used on structural steel that has been primed and body-coated with two coats of rust-
(14) Black-graphite oil-based paint. This paint is used as body and final coats to cover primed
surfaces of ferrous metals. The graphite in the paint has leafing properties that account for its durability.
There are two types of graphite paint. One type is a steel-gray paint that has a metallic luster.
Lampblack or carbon black is mixed with natural flake graphite, as well as other types of natural and
artificial graphites, and is dark in color. Light-colored graphite paint is intended for body coats, and
dark-colored graphite paint is designed for final coats.
(15) Iron-oxide red and brown oil-based paint. Exterior iron-oxide paint is manufactured in
different colors of red and brown. It is an economical paint, and it is durable. Spar varnish and zinc
oxide in the paint increase its color retention and decrease the paint's tendency to mildew. Iron-oxide
paint is intended for use on roofs, barns, freight cars, and so forth. It may be used for body and final
coats on metal, wood, and masonry. You can use this paint as a primer on structural steel, although it is
not as satisfactory as a rust-resistant agent for ferrous metals.
(16) Aluminum. Aluminum paint is probably used for more jobs than any other paint. It is a
desirable coating for battleships and large bridges, since the dried film weighs less than half as much as
the film of any other common paint. It is used to cover and protect steel structures and buildings,
because it is durable and light-colored. It reflects light and heat more than any other paint and has a
desirable decorative finish. It is commonly used as a body and final application over a red iron-oxide,
zinc-oxide, or linseed-oil priming coat.
Aluminum paint provides excellent service when applied in two or three coats, without priming paint, to
clean and rust-free surfaces. When you paint steel, the importance of clean surfaces cannot be
overemphasized. Aluminum paint is also used successfully for painting galvanized iron. Without a
primer, the paint will bond satisfactorily with the galvanization if the metal has been exposed to the
weather for at least 6 months. Aluminum paint possesses excellent durability when used as a priming
coat for wood construction. It will cover soft, pitchy, and resinous spots very effectively. It also
prevents the bleeding of wood stains. You may apply final coats of light-colored paint when the correct
aluminum paint is used as an undercoat.
(17) Cement-based paint. This paint comes in powder form and is used on porous interior and
exterior masonry surfaces (except gypsum plaster). There are two types of powder. One type has 80
percent portland cement and 10 percent hydrated lime. The second type has more hydrated lime and less
portland cement than the first. Use the first