Looks like a good plan. I think you might want to research this a little farther.
This will be more then enuff paint for my large skoolie, from the sounds of it i will have a fair amount left for future touch ups or other uses around the ranch. The insulating micro-beads will be used on the POR15 flooring paint.
The way I read their info and from GlennC's site I think you will need much more than 1 gal Also is POR15 actually paint? Will it accept the micro-beads, or be effective with them added?