The WD stands for Water Displacing, by the way.? 40 is presumably because it was the 40th substance the manufacturer tried.Jim FordSent from my Verizon, Samsung Galaxy smartphone
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-------- Original message --------From: "Greg Muir via Groups.Io" <big_sky_explorer@...> Date: 8/14/19 10:09 AM (GMT-08:00) To:
[email protected] Subject: Re: [TekScopes] non-gumming oil WD-40Spent a couple of years working in the tropics with extremely high humidity.? I used to protect tools from rusting by wiping them with WD-40 then storing unused tools in plastic bags.? What I found after coming back after several months to use them was that the light hydrocarbons used in the product had evaporated leaving behind a petroleum based product with the consistency of something between 90 weight oil and Cosmoline.From this I learned that it is only good for a very few purposes (aside from the original intent of the product for coating the outsides of missiles to prevent corrosion) is to protect items from rust and corrosion (with some subsequent clean-up effort), a penetrent and, on occasion, a gummed label remover.? When I hear of someone using it to lubricate potentiometers, switches and such, I wince.A footnote: while at the project it was interesting to find that all of the local outlets sold WD-40 in gallon cans, an indication that I was probably not the only one facing rust and corrosion issues.Greg
