This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
In a laboratory it was very difficult to keep the line shaft and countershafts bright and free from rust, owing to the fumes and gases issuing from the several fume closets within the same room. the following method was tried, and proved very satisfactory. The shafting was covered with two coats of flat white paint and allowed to dry, after which a coat of white enamel was applied, giving it a clean, glossy, and sanitary appearance. This eliminated all the trouble of cleaning it with emery cloth, and it also made it appear in harmony with the other furnishings of the laboratory. - Contributed by Geo. F. Stark, Norwich, N. Y.