In case anyone is curious. I use the same old brushes that come with Photoshop with the exception of a feathered, dot brush that I made myself. Typically the hard round brush, the faded airbrush and this one custom brush are all that I use to polish my under painting.
If you look at my WIP for this image you will see that the under painting is started in photoshop and then brought into ArtRage for a traditional media feel.
Then I import the work back into Photoshop for polishing. Nothing fancy