look for stuff called "arena board" to put on top of marine plywood - it's the plastic sheet they use around hockey rinks [where it might be called 'puck board'], near bullet proof
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
