Kelly Namowicz has a plan for the rest of her life. "I want to go the California Culinary Academy in San Francisco," she says. "I want to be a professional chef." But until now, there were 14 things standing in her way: tattoos that once almost covered her hands and arms, forcing her to wear long sleeves to job interviews to avoid being stigmatized. "People judge you," Namowicz says. "People don't want to admit it, but it happens." Now, the tattoos are almost gone, thanks to a city program called Clean Slate. It pays for laser treatments that erase the...