Sounds like a situation made to order for Humbrol's "Track Colour" which is very nearly the perfect brown/red/grey color.
Leather with some NATO black would work, too.
Finish the topp edges in Steel, then burnish with a pencil for the highlights.
For damaged track, I'd probably dry brush "Burnt Iron" of the ends to tone down the effect, too.
From Pawel's photo abobe, a person could be forgiven for starting fro ma base of, say, panzer grey, hevily washed in Steel, with Silver on the bearing surface.
But, that's just my 2¢; for coffee at the shop you'll need some folding local currency.