longtime friend toni andrews tells me more. >> all he said was, "who's gonna buy something from bill wagner guillermo is bill in spanish. granizo is his mother's maiden name. and he says, "i'd buy something from from guillermo granizo, but bill wagner, i don't know." >> how did his look change? >> he went from very clean-cut to start wearing brighter-colored shirts, and then his hair grew long. >> we used to call him the hippie. here i was with a suit and tie on, going to work, and he was going with a paintbrush to the canvas. >> make that paintbrush to terra cotta. inspired by mexican artists such as diego rivera, granizo devotes himself to painting ceramic tiles, an ancient art form. he comes up with his own techniques and secret recipes for his glazes. >> in some ways, this is liquid glass. and you can see that these glazes are very similar in color, so you really don't know what they're gonna turn out to be until you fire them. >> you're saying that, once in the kiln, can turn out and be as bright and beautiful as these? >> absolutely. they go from grays to bright colors. >> how did gra