This 1950 color U.K. documentary “Red Ruin” about rust-preventing fluid is sponsored by Shell, a Film Producers Guild Production, directed by Nigel Byass, and photographed in Kodachrome. ts Britain’s weather is stormy to clear (:35-1:12). A tractor drives down the middle of a town road (1:13-1:25). A tractor with a binder harvests wheat (2:01-2:24). A Caterpillar D2 tractor pulls a plow. Other mechanized attachments work the field (2:25-2:57). Farm equipment is backed into a barn. Rusty metal farm equipment is outside in a field (3:00-3:26). Rusted farm equipment lies abandoned in the grass. Parts to a manure spreader are shown (4:16-4:50). A farmer examines a metal part on top of a gasoline barrel (5:00). He drives an Austin to town (5:15). The broken piece is tossed onto a pile of rusty metal (5:45). Iron ore is dug and dumped into train car beds (5:55-6:50). A farmer rolls a tin milk jug (6:51). A hand using a blade scrapes rust off lead window pane beading (6:56-7:15). To test rust environments, an iron mower blade is dropped into jars containing just air, distilled water, water, salt water, and water followed by sprinkling with fertilizer. All five are photographed once a minute over 24 hours and shown using time-lapse photography (7:16-8:52). Each is lifted out and examined for rust. Worst is the fertilizer, which influences farm equipment blades (8:53-9:44) Second is rust. A man smears tallow on a battle axe, waterproof paint is applied, and mineral jelly is applied to a hand saw (9:45-10:00). An example of how oil sticks to a surface is shown in a glass. Another substance is applied to make it water resistant (9:45-10:30). A man and woman work in a laboratory full of jars and tubes to study corrosion resistance. Cotton wool is saturated and put in beaker of water and in one that displaces the water (11:05-12:40). An experiment uses the same treatment on metal; only one begins to rust (12:41-13:41). Three mold boards show the experiment. The first is left alone, the second gets greased, and the third brushed with dewatering fluid. They are left outside to weather for three weeks. The first is rusty, the second has some cracks in the grease, and the third has a coating that is easily wiped off with a paraffin rag (13:42-14:44). Various pieces of farm equipment are shown. The worker tries to loosen a manure spreader rusted solid. A water hose is used to clean the parts and then rust-preventing fluid is applied. A close-up shows the fluid driving off the water and leaving a protective skin. Another model gets the same treatment (14:45-16:30). The binder’s knotter mechanism and twine eyelets must be rust free. The fluid is applied by brush to its knotter, jaw, and fingers (16:31-17:49). A special compound forms a thick seal over the metal for added protection (17:50). Nuts and bolts are rinsed in the dewatering fluid (18:00). The fluid is sprayed in a combine harvester (18:09-18:30). Tractors with mechanical attachments work the fields (19:06-19:36).

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