At 54F, you'll then need an angle grinder to get the wax off!
Just kidding, but there is some truth to the temps at hand to not so much apply, but if you can get it off without killing yourself and/or not being able to fully remove product.
I've encountered such too many times to count when I lived in Chicago.
And I've gotten away with products like Collinite #845 and #476 and the temps were in the single digits outside my then 2-car brick garage.
What helped, even though temps may have been actually closer to the 40's in the garage, was a forced air Propane Heater. It no doubt helped the wax dry for easier removal. It it never dries, or stays 1/2 wet, then you'll perhaps have difficulty with removal.
The best advices I can give, is test. Test a small area, see if after 10 minutes or so, if you can remove any given product. Do not commit to doing the entire vehicle, then later realize that you "are in a world of crap"!
If one product ain't cutting it, look through the rest of your products to find something that does work, and does come off.
I've been faced with such situations, where I concluded "getting something, anything on the vehicle was better than nothing".
I have absolutely no experiences with anything like PBMG WOWAs, or their Sealants in the cold, but I would say it might be a general rule to stay away from hard pure Carnauba Pastes unless you get a good day, and break with the temps.
I ordered a gallon of Duragloss Aquawax yesterday, might be in this Saturday, but such "might" be a product I'll be reaching for over the next few months here if I find it works.
Hope this babbing of mine has offered some help, and Happy Thanksgiving to you, and yours, and all the folks here!
Mark