actually Brian, I've forgotten to erase a marker line on dichro, and the flame didn't remove it, it scummed it up, but it was still visiable.

I use aluminum oxide to blast with, my grit just frosts the surface, silica sand will leave a much rougher surface, but a sandblaster reallly just dosen't cut deep, a waterjet thats another story, I've never seen it used, the knife or another tool will serve the same purpose, faster....good thought though Matt, have to cut a pattern and fill it in with color and see what happens.

steve