Well, it depends on your intent with this question. Yes, technically you "could" use an interior paint on an exterior surface. However, just because it is possible, does not at all make it the best idea. Excessive rain and dryness, extreme temperatures, winds and the like are brutal and will cause damage, cracking, peeling, and fading. Exterior paints are specifically designed to withstand the elements and the abuse they can lay out on a painted surface.All Rights Reserved