I am thinking about "updating" the look of my 1970's home by coloring the drab light gray concrete between the sandstone slabs in the entrance way (steps also)....is this a pipe dream or can it be done by anyone? It has never been painted or stained before but looks ugly to me....I don't want to make it look worse however....any suggestions? What kind of stain? Can it be hand-painted on? etc......anyone ever done this before????