depends what wax, Klasse and Zaino seem to still do well in cold temperatures (mid to late 40ish) but some have waxed a bit above freezing.
as for the #9, I would think by performance, if it seems to be "working" when you use it, then it should be fine too. It helps to have a garage so that you car paint can stay above freezing
have fun, hopefully it'll get warm soon