Thread: Problem with waterspots

Interesting idea, the Rustblueing. That could be pretty damn cool.

Zen, it's a modification of a trick we use for powdercoating welded steel. The welding will introduce little gas pockets under the surface, and when you heat the part to bake the powder, the pockets burst and damage the finish. So we bake the parts first to burst all the pockets, then proceed as usual. The bit about applying the oil hot is from firearm conditioning.

Just figured that if there's actually something in the blade that's holding the moisture, the ideas should transfer. I recommended the hair dryer because it shouldn't get hot enough to damage the temper of the steel. Let me know how it works if you try it.

P.S.
Are the spots always in the same place? If it's something in the metal, they should be. If not, I'm going with Jerry's theory about minerals in the water.