Has anyone had any experience using pan pastel? The issue I'm having is related to using white pan pastel on black paper. I tend to like using pan pastel to get the starting values in my art. But, once the pastel is applied to the paper, I'm struggling to use white charcoal pencils over it. It's like the pan pastel fills the grain of the paper and the charcoal pencil has nothing to grip to. This results in the pencil scraping the pan pastel rather than applying charcoal to the paper. I've tried using compressed white charcoal, but the same happens. I've watch some tutorials on thus and they dint seem to have the same issues. I've managed to get around this by drawing over the pan pastel with soft white pastel sticks, but that's not my preferred method. Black pan pastel on white paper isn't an issue. Vine and willow draw very well over the pastel, not white seems to pose issues. Any tips?