Trained as a social worker, Cristina Garcia claims her childhood art classes were a disaster. Despite protesting that she has never had skilled hands, her pop-up upcycling business, Grita, is flourishing. The name, which Garcia explains translates as “shout” from her native Portuguese, captures the self-affirmation she has enjoyed since changing professions. The small business offers a gentle success story of textile upcycling—unusual because it turns interiors fabrics into clothing...