So I applied it to a test piece of track about a month ago just for shits and giggles. The rail in that section still shines and when I run my finger over it I never get any black stuff on my finger. Whereas I always get black stuff on my finger in the areas of my layout that I'm cleaning with IPA. In fact, I will get black stuff even immediately after cleaning with IPA. So my conclusion is NO-OX prevents the black stuff from occurring therefore reducing the need to clean the track. Which in theory should also help with dirty wheel issues.