I've painted in freezing temps. Heat the part and the paint to 100°F. Go outside, quickly spray, leave part outside until it has cooled/it can be handled. Then bring it in. It will continue to outgas for a while, so be aware.

 

lol you all almost convinced me until I looked at where you're all from... this is Edmonton! We get -20 to -30 CELCIUS for two months straight this time of year, except for a couple week-long dips to -40.

(-4 to -40 F)

I just want to get it running. Summertime I'll make it pretty.