My guess is WD-40 left an oily residue they didn't like. I use CRC 3-36, and once dry, the metal just feels smoother.
I wonder why they didn't use simple mineral oil in the study, since it's one of the ingredients of CRC 3-36. Mineral oil doesn't smell, doesn't dry; it's surprising how little attention it receives and yet when one looks closely at other products it's there as an ingredient.
Are there any disadvantages to using mineral oil as a rust preventer?
You can buy gentle cylindrical heaters for gun cabinets and pianos. I put a long one (it was called a Damp Chaser) in an upright piano once when it rained most of the summer and the keys started sticking - it fixed the problem. I have a short one in my gun safe - never a spot of rust on any gun or barrel. (Of course, I oil everything too)
IF you are good friends at the local Drug Store.....ask them about that packs that come in the Bulk pills containers...that they throw away....saves them the expense of trashing them.
A Planer? I'm the Planer, and this is what I use
I've been using 3.36 ever since that article came out, and have been very pleased with it. It comes in various sizes and types of dispensers. I bought a couple of the pump spray bottles, and a gallon to fill them with after being very satisfied with the first spray can of it I bought to try. There is still a lot left in that gallon that must be 8 or 9 years old now.
I leave it standing on planer beds that don't get used very often, and it's not hard to get them ready even after that.
Last edited by Tom M King; 01-14-2022 at 5:02 PM.