You can also use dry powder temper paint and other type stains if you need a stronger color. I really like the dirt though if possible. Most people doing this for their personal horns will likely be happy with this product. Wax is still warm in this pic. Let horn sit for 24 hrs and the color will be less shiny.
There are still further coloring techniques I will cover for those needing the expert touch, but those will have to wait until I can get more pics together.