I have a small ceramic heater that I know is puny, but if I close the shop doors (it's insulated and a single stall wide), it should do fine. I was thinking of my feet on the concrete slab and wondering if anyone had experience using foot heaters - the kind you use for hunting, hiking?
Do they work? What other things do you do to stay warm in your unheated shop? Extra socks? Thermal underwear?