How do you weather tracks and or cars.Would like links?
Equipment weathering is usually done by air-brush. There is also spray cans of “Instant Weathering” available at most Hobby shops that cater to modeling.
I would start with the NMRA (National Model Railroading Association) for references, or you may find books on the subject through Amazon.com.
You’re going to want to practice on some cars you won’t mind tossing……………