When your polishing you are creating a lot of friction, which in turn creates heat. This will allow you to buff in below freezing temps. As you move along you will be gradually heating the metal. You will see some warping going on due to the expansion and contraction of the aluminum during the temperature differences, all of which is normal. As long as your body is comfortable in this condition, it is OK to polish. I would however scale down your "working zone" to a small fraction being that you don't want the compound to freeze. same amount of compound just smaller batches of work... Make sense?
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