Agreed, especially for large flat areas. Washes can also work well as a glaze too in this situation - you start with the light color and do...
The wash method works great and is ridiculously easy. Here's a tomb king I had based in white and washed and that's all (for the bone that is)....
Agreed about the washes. GW's current line is quite nice, especially Devlan Mud and Gryphonne Sepia. I also like to use good art inks as glazes...