Two-Tone Layering Question

Hmmm.. Single stage not being my normal thing, considering you're going with the roof black I'd have to make a WAG that a gallon will be right, maybe just a bit left over. You painting the jams? That might mean you need a little more.

And I was confused by the "kit" designation but no listing of hardener or reducer also. Might call just to make sure you order what you need and nothing you don't.

Also for the best look and feel paint the purple first, IMO.