Hi Joe and gamera,
Sorry I didn't get back to you aerlier, but pneumonia got in the way.
I handpainted the smoke rings using the thinnest brush I could fine and thinned the acrylpaint. Though I worked carefully I considered the rings to be too thick. So with the smae bruch I made them thinner by applying desert sand colour in the inside of the rings. That looked much better. To make them a bit rougher I used the cocktail sticks, dipped them in the green paint and aded these little bulges. Hope this helps you out.
Cheers from Holland!
Jan