EastCoastCB: Thanks for this catalyst tip! I picked some of this up at Tractor Supply, my first time there, and it worked beautifully.
I went ahead and used the full container to the gallon. It was a little late to start, 5pm, but I enlisted my kids and we went for it.
I ended up painting until 10pm so that I wouldn't waste any. With the outside done I still had about a quart left so I moved inside and used the rest on the interior framing and panels until I ran out.
As advertised it went on very smooth and set up well. It needed to because I was getting rain overnight and I wanted it done. This morning I took a look at it and for a first coat it really looks good. It laid down very smooth and the flat area we rollered ended up with just enough of a nice, subtle texture while the rub rails that we brushed looked smooth as glass. GREAT stuff!