Keeping my paints in the garage shop in cold months

[AlanG]

That's new to me Al, will see I can find more about them

It's normally used to stop water pipes from freezing in the winter. Very useful stuff

[Ian M]

The cheapest and most dependable is to keep them in the house. Take the one(s) you need into the shed to spray.
My only other real though is that if the shed is to cold to keep the paints in, it is going to be to cold to spray in as well.