Is it the stain or the material or both that is affected by the cold temps? Last year, I sprayed 4000 board feet of pine ship lap in a closed up shop with the salamanders running to keep it at 50. Had to quick back brush every board. It adhered fine but was a PITA to apply and seemed like I went through a lot of stain to get it to cover. Yesterday, I sprayed about 2000 board feet of the same material in the same shop but with the windows open and maybe 5 degrees warmer. No back brush required and I used 1/3 less stain. I'm assuming that the stain was pretty close to the same temperature both times as I kept it in the house until I was ready to spray. Is the difference the temperature of the material as I likely only got the air up to 50 degrees last year or maybe air changes had something to do with it?