Thanks guys! Yeah you were a huge help with that tip Kovan. @DRM: I just did a lot of smudging but I sharpened.... Wrong sub-tool I guess!
start of with a simple brushed white or soemthing and then use a 3 pxl smudge and brush the way you want the smudge to go and just work down to a 1 brush, heres a youtube tut i found useful when i started making it, ill see if i can find it..... http://www.youtube.com/watch?v=mlzVXkTBW5E i used this just to start out with, get a bit of practicing and your will be making some sweet smoke, the liquift tool works too