I use my 60w laser cutter on a regular basis and it has made a real difference to the quality of pupils work. However, it does leave a rather unsightly dark brown edge on the laser ply that I buy from Technology Supplies. I have used sanding to remove this and although it works, is very time consuming. Therefore, I have the following questions : 1) Does anyone know of laser ply that cuts without leaving a mark on the edge ? 2) Has anyone come up with a better technique of removing the edge without resorting to sanding it away ie wiping down with some sort of fluid ? I am at the point of making the dark brown edge a design feature to save lots of time !