Neat! I really like the Habitrail idea. Very inventive. I can appreciate its value, having once rebuilt the front brakes on an old Land Cruiser in the driveway in 15" of snow. One big problem with working in the cold, numb fingers aside, is that paints and adhesives can be awfully slow to dry or cure.
Just please be careful with those kerosene heaters around flammables. They're a source of ignition, especially for vapors like gas and paint fumes. Years back, an acquaintance burned down a very nice garage & two cars with a woodstove while rebuilding a carb.
Jim, "Mo' coffee!"