Hi Howl! I just used the low-vco paints in my bedroom/office project. I found the colors I wanted (benjamin moore) then had a local paint store mix up the tint in an environmentally safe version. I don't think they used a specific version at all, they simply used a water-base recipe. They were unable to make really dark colors. So my best advice would be to call your local stores and see if they can do the same thing for you, and whether this would be workable for exterior conditions.