I do but I always give the project several coats of spray Krylon Satin or clear, I don't always have the right color in Patio paints. I have used Folk Art regular & outdoor or some other older brands. haven't used Martha S. paints, don't know anything about them. Jan

I mix all kinds of paint promiscuously. Interior and exterior house paint, tube acrylics, bottle craft paints all seem to mix just fine--I used them all in a couple of murals a few years ago.

If you can find universal tints (used in paint stores, also available in tubes and jars), you can custom mix colors in any kind of paint, including oil based--and even grout.