need help on smudging

[Theelectrogypsy]

http://krs25.deviantart.com/art/Smud...39860728&qo=26

http://wrftw.deviantart.com/art/uchi...y%3Awrftw&qo=0

also

http://wrftw.deviantart.com/favourit...et=48#/d1rz9np

thank you very much. also you can comment on the tag if you want! i would love some pointers
i used a large px brush then to add details lower the px hard brush and smudged