Thanks!
I painted the inside of the brush white and let it dry overnight. The next day i used a sanding bit on my dremel and sanded the white paint until i was able to see some of the lucite again. I then painted the inside with blue paint and this is how it turned out. This is the 1st time that i've tried this technique and i'm pretty happy with how it turned out, kinda looks like clouds in the sky.
Wow - that turned out very nice. Very creative way to get that effect with the painting and sanding. I particularly like the close-up shot of the straight-edge in the back of the brush.