I want to wax my snowboard, but I don't know if the base is sintered or extruded. I can't really figure it out, please tell me how to tell. The board is a Burton Joystick. I've been riding for years, but always used rub on wax until now, might hot wax it tomorrow. if it is extruded, should I still hot wax it? Thanks and if you have any other tips please share.