You should be able to get a concrete sealer from Home Depot or the like,
then use an exterior latex for a base. Most local sign shops a re a good
resource for pro-grade materials and techniques, I have found them to be
quite helpful.
>Does anyone have experience with outdoor building
>murals? >
>The main question is what to prime walls with: one
>building is painted brick and one is painted concrete.
> Also, do you seal the project when you're finished?
>If so, with what product?