Gary,
Is it rusted or corroded? There are a couple of things you might try;
- Some people soak tubular track in a product called Evaporust, available at Autozone or Advanced Auto Parts. It does a good job of removing rust if you , soak the track in it for 48 hours and then wash it off. I have not tried Evaporust on Fastrack, so I don't know how the plastic roadbed would react to it.
- You might buy a scowering pad called Scotbrite , available at Kroger or Publix and rub the track with it. Scotchbrite does a good job removing rust. Do not use steel wool.
Maybe you could post a picture of it so we can see what the problem looks like.