Please give me some liquid solutions that should remove my rust from my 027 three rail tube track.....thanks.....
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Vinegar.
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I recently purchased Lionel O Gauge track from a living estate sale and was going to ask a similar question. After searching this forum and YouTube, two liquid solutions was Evapo-Rust and vinegar as Train Nut has mentioned. Haven't had time to clean the track, so asking our forum members which is best or is there a better option?
Fine sand paper on top of all 3 rails. I leave the rust on the side of the tracks as real railroad track sides are rusty. If it is too bad on the side use a hand wire brush and if that is too bad discard that piece of track.
Charlie
For the lowest cost and convenience try vinegar. But I know Evaporust works well and can be poured back and reused until black sludge, it's ate so much rust.
It's not something to overthink and you may wait months to find that one member that used one just because the other wasnt as good.
Soak ,check, agitate, soak, check, etc. Only you know how fast it's working on your track be it vinegar or Evaporust. Evidently both work. Try one. Not happy? Try another.
The electrolysis method of borax in water and a battery charger is likely the best wet method.
If you use abrasive flush and brush it off well. Try a scotch brite pad instead of sandpaper unless you know metal finishing grits...you don't. 
I've used Evaporust on rusty O27; works fine!
Mitch
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Rusty 027 track, I throw it away.
Gotta tell you guys......went and got some white vinegar......put my radius track in a bucket.....within a half hour.......rust is melting away.......using a scratch pad and small wire brush......Amazing .....looks almost as good as new.......many thanks to everyone who responded.....👍👍 cleaning the straights also.........
