My old house had this concrete porch on the front which I hated. I always wanted to cover the bottom in brick. But this is also a pretty cool idea if you too have not-so-pretty concrete in front of your home. It was done by making stencils of the numbers then using a foam pouncer, stencil with outdoor paint. I wonder if a concrete stain would work as well? The homeowners combined black and earthy brown paint to achieve a mottled look for the numbers.