Riki, I'm not sure you've seen track from the "rust belt".
Your pin joints might rust causing "death" to some track faster than the rail tops need work. 5 years of no use in a garage, basement, or attic can leave some looking like WEMDD's wheels.
A chemical solution would be great.(hey that's punny)
A hobby bench grinder does a decent job topside.
But a bump & grab will tear apart 0-27, and your finger tips on my Thor
.
I found a good Scotch-brite tool. Two 5"or 6" wheels doubled on a hex. Drill mounted, or on a die grinder.
Its my fav. because the size gets two rail tops with each perpendicular pass, and is wide enough to hit both sides going between as you make parallel passes. The wheels also separate slightly with pressure, to stay on the track as you get the sides of the rail. A slight cant to parallel and plumb is all it needs.
