Been using it for about 35 years and it's been working great so far.
Well, they haven't rusted for me in the last 35 years. WD-40 is an oil based product; it can't make a gun rust by itself. If a gun rusts after it's cleaned with WD-40 then it probably wasn't stored right.DO NOT USE IT TO CLEAN GUNS!!! THEY WILL RUST!!!!!!!!!!!!!!!!!!
Oopps Sorry ARI, I didn't see that you had already pointed that out. I need to read more carefully....It took them 40 attempts to get the water displacing formula worked out. But they must have been really good, because the original secret formula for WD-40â€"which stands for Water Displacement perfected on the 40th tryâ€"is still in use today...
Interesting. However, I read an email passed around on the net that the basic ingredient in WD-40 was fish oil.The chemical properties of WD-40 is a trade secret, but its primary composition is kerosene and several water displacing solvents.