There was a companion thread all about aging and weathering track, apparently they AFV modelers use burnishing fluid for this chore. There was a huge discussion over if the fluid should be agitated while the track was soaking in it, if so, how long, how often and how much agitation. I seriously thought some of these guys were going to come to electronic blows! I think I will stick to aircraft, I have learned how to handle rivet counters, don't think I can handle track drapers!