For all day outside in the cold I like a thinsulate glove liner inside insulated leather mittens. The mittens keep your hands warmer than gloves and you can take them off for fine work without touching ten degree metal with bare hands. Wool shooters mittens that fold back and have tipless gloves have their use too. The wool keeps your hands warm even when wet.
By the way, if you are going to be on a lift, a layer of cardboard on the floor will slow the heat transfer out of your feet, dramatically.