After reading Bill Brillinger's method for painting track and weathering ties I was motivated to get this done on my layout over Thanksgiving Eve and morning. Thanks Bill!

Today and this weekend I plan on drybrushing the ties following an older technique on this forum. I will start with drybrushing a white paint over the top of the ties and us a series other drybrushed colors of washes. Once the ties are finished, what is the best step for adding static grass. Before ballasting or after?

Any other advice would be greatly appreciated. 

Robert Gross