Metal Surface

I have decided to use a metal surface to use my paints on. Here I can manipulate the paints on the surface, allowing them to dry then adding more to it creating layers. I have to be careful while doing this, since if the crayon is left on the metal surface for too long, it'll start to burn and fumes will come out. The crayon mixed with linseed oil had an interesting affect, but only when it was on the bottom layer. It came out from underneath and made great looking lines of orange. The image was easier to correct when it was melted as well. I think the best way to do this would be to have the metal plate a few centimetres off the surface, this way it won't get to hot that it'll start burning.