Tiny tube-brushes for cleaning insides of rails, Standard & O-gauge ?

There is a type of Pipe Cleaner that is rigid with stiff bristles.  You can dip it in alcohol and it fits tightly into O gauge tubular track and does some good at cleaning;

Ream N Clean

Bryn Mawr

THe Chenille Kraft Co

Gurnee, IL 60031

Item W 208

Fran McM posted:

I've read about some folks getting small stainless or brass tube-brushes from McMaster-Carr  for cleaning the insides of Standard & O-gauge tubular track, where the pins seat.

Does anyone have suggestions for a good working brush diameter for said brushes ?

Thanks ! 

Fran McM

Fran,

I use a small "rat tail" file.