Earlier today I ran out of stained ties for the siding. So I set out to stain some more ties. I did this by simply letting them swim in a bowl with black water color. After a few minutes in the bowl I moved the ties to an old news paper to dry, as shown in the picture below.
This batch of ties turned out somewhat darker than the previous one. To compensate for that I swabbed on some more black water color on the ties already in place. While at it, I also put on some orange/brown water color to simulate rust (beneath the rails to be).
As you can see the flex track main line needs som weathering as well. Compared to the wood ties on the siding it really looks plastic right now. I'll probably paint the main line ties and rails with "grimy black". From Tehachapi photos on the web it looks as if that would be about the correct color (http://www.rrpicturearchives.net/archiveThumbs.aspx?id=12865).