Quote Originally Posted by ZenEdge View Post
Hi Jerry, thanks for your post. The water is not artificially softened in any way. It comes from rock aquifers in the mountains. The local residents are adamantly opposed to any kind of tampering of the water, including the addition of fluoride... ZE
Well that does mean that there isn't anything extra added there, but since it's natural water it might contain trace minerals/salts that cause the spotting. Or it just might be the steel. You could try to eliminate the water by purchasing distilled/bottled water, heating it and shaving with that for a while and see if the spotting is as bad.

If it is, I saw a blade here that somebody rustblued for the same reason.