No question that WD-40 is a great "moisture displacer" & rust preventative. I copied photos of a Brownell's rust test from about 4 years ago. WD-40 was better than any of the other spray gun lubes and equal to greases like Cosmoline and Rig grease. What I have is a copy/pasted mess that I can't post, but I've contacted Brownell's and asked if they have a link to the original article.
BUTDon't you hate that word?? WD-40's lubricity was not very good.
Take a look at this info:
http://www.tetraproducts.com/images/Consumer%20Brochure.pdf Of course, the info is from Tetra's site, so a grain or two of salt may be in order before swallowing......
I'd like to find some comparative test information on BALLISTOL, Richard S's favorite gun care product, but haven't been able to as yet.
Every time I open my gun care supply cabinet, I feel a little like those hoarders you see on the cable channels. I must have a sample of every firearm lube and grease made in the past 50 years. From Hoppe's No. 9 to MilTec. Personally, I keep coming back to:
1.Shooter's Choice spray action cleaner
2. EEZOX cleaner / lube / preservative (just bought a quart can direct from the manufacturer.)
3. SlideGlide grease from Brian Enos for the high load areas.
Steve