I don't bother with cleaning pins - it isn't worth it to me as I have an accumulation of serviceable track and pins - with serviceable used track, I find myself using ST-342/ST-384 equivalent track pliers to shape the rails and tighten the pins. i will also replace a troublesome pin with the same tool. Followup with a quick wipe of goo-gone to clean the rails and CRC 2-26 on the pin mating surfaces, and I'm good to go. Also on rare occasion, I'll Scotch-Brite the tops of some rails, but if the tubular track needs a lot of work, it isn't worth it to me and the track piece gets set aside to donate what it can as to ties, insulators, pins and such to make insulated rail or other custom track sections.
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