Ya your pixels are pretty good. But as a quick tip when abstract brushing try useing 4 brush layers. 1 with a grunge brush and the others with abstract brushes and do differnt colors on each and use differnt blend modes like overlay,linear dodge, linear light, etc. Even get rid of one or 2 of the layers that don't look good. You would be suprised at the result I think. Assuming that you are using photoshop. :D