I disagree with most of what was in the piece as it stands. While I am an advocate of tool care the reasons given for doing so are laughable. Rust should not be considered an impurity, it’s a nutrient. Both iron and manganese oxides, the most prevalent byproducts of the oxidation of modern steel, and necessary nutrients in plants and those who eat the plants. If your tools get rusty, work them, clean the remainder, and then oil. As to oiling, wd40 and light oils like 3 in 1 are commonly used, but these are toxic. I use vegetable oil for daily use and linseed for storage. Also, rust isn’t “oxidizing” to anything but a more electronegative material like zinc or aluminum. Rust is the result of oxidation. It also does not cause infection. It can, however, harbor microorganisms that will promote festering.

And, as a final note, don’t purchase your supplies in single use containers! Seal them correctly and they can’t react with fumes from volatile hydrocarbons. Gallon pickle jars are great for sealing away bagged materials while retaining proper labeling. Screw down lids on materials that can in polyethylene containers and you get neither an influx of tainting fumes or loss of efficacy due to volatilization of your chemicals. An added benefit is that there will be fewer packages being dumped than if you had purchased small containers instead of a seasons supply.