Ok so this is the problem, I need to do some polishing and I don't have a heated garage.
I am guessing you need the paintwork to not be freezing so the polish can be easily broken down and on cold paintwork this isn't easily achievable. Would polishing on a much smaller scale be a quick fix for this i.e. doing 1/2 a bonnet at a time or even a 1/4 at a time to maintain the heat in the polish when using a g220 for example.
Must be possible as I see companies who detail on the move so obviously they wouldn't have the car in a heated environment.
Edit: Also what about warming the paint up slightly whilst washing by using warm / hot water
Cheers !