What planet do you live on that this is a problem. I have churned through hundreds of games over the years, and seen thousands more, and I have never even seen rust on a Japanese stick that wasn't from the early 80s. And on those that do get a spot of rust a little mild sandpaper will take care of it for about 5 years or so, at which point you will do it again.
I am running some sticks right now, that went through that giant tornado in Joplin, MO some years back, then sat outside for 3 years where the cabs landed, then I took them home, stuck them in the drill and sanded the shafts, and now 4 years later they are all still rust free.