Dynamic Paint - Brush Erase - Cycles

Hi, I’m using Blender v2.74, onWindows 7, 64bit with a Nvidia GeForce GTX645.

I’ve been using Blender for 2 - 3years. I’m currently trying to use Dynamic Paint while using theCycles render engine to erase paint on a canvas. I cannot see awayto erase paint with the Paint – Image Sequence. I believe ImageSequence is still the only format option with Cycles supports for thesurface type Paint.

I’ve spent a few hours trying, no joy. No texture just a colored material.

Does anyone know of a way to use theBrush Erase feature in Blender with Dynamic Paint and Cycles?