I didn't realize you had a max trak. WD-40 is mostly solvent, so it could be that using it would be an issue. Maybe you could use a block with a very low-nap cloth, so it only goes on the rails. A little will go a long way to prevent the oxidization. But rail cleaning is a maintenance chore with HO tracks that you'll never get away from, so you just need to figure out the quickest and easiest way to deal with it.
The other option is put a car on the track and keep pushing it around until it can make full laps under it's own power....
John, I'm going to take my chances with WD-40. I'm tired of cleaning the rails and WD-40 makes it a lot easier. Cleans the track surface really good as well.
And it seems it's not all that uncommon for people to clean routed tracks with WD-40. Jeff Strause mentioned it.