It seems like you can never have enough paint related brushes for photoshop. Splatters, water color effect, and some high quality strokes can make their way into just about any design. This is a collection of some of the best free paint related photoshop brushes from Deviant Art.
If you use any of these brushes, please be sure to follow the guidelines as listed by the creator on Deviant Art. Many are free for commercial use, but some ask that you not use them for profit. Many of the artists just ask that you send them a link of the finish product so they can see how you used their brushes, please do this if you are able to. The members on Deviant Art are nice enough to share their work with us, its the least we can do.