The weathered rails look MUCH better! Here is a tip for your ballasting process:
1) Visit Home Depot, or other "big box" supply store, and get a 50 pound bag of cheap sand-box play sand. Dry the sand in 3 pound coffee cans, or 5 gallon buckets, until it is completely dry.
2) Apply the sand in the format you desire the ballast to look like, being sure not to apply too thick a layer of sand.
3) Spread a thin layer of your ballast of choice making sure to cover the sand.
4) Moisten the ballast/sand with CHEAP rubbing alcohol, using a pipette.
5) Using a different pipette, flood the ballasted areas with Matte Medium, thinned to the consistency of whole milk. Allow 24 hours to dry.