These tracks are something that the entire assembly should all be stainless.
To me, it seems that no matter what you do has little long term effect.
Switch to the bronze rollers. At least those won't freeze to the tracks.
If I had it to do again, I'd consider ceramic coating the tracks. It may not be 100% effective over 20 years but it sure won't hurt.
You just don't want to do these things over and over again.
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