My garage is heated and at keep it at 60F but most of the parts are out of the garage in my heated basement. I apply with a foam brush then work the material in by hand (bare hands) for several minutes per panel. After I apply another coat (heavy) and let sit more days.
Was going to use it in the F-car but had the dealership clean and detail the car. Used this stuff in my twin-turbo Z and could feel the seats feeling softer. And since it is all natural(I think) I don't worry about what toxic chemical will be absorbed into my body. The bottles are not quite flat on the bottom which I find unusual.