Top Chef alum Mike Isabella will open Graffiato's second location in Richmond this spring, making it his fifth restaurant either open or on the drawing board and his second outside the D.C. area. Isabella opened Graffiato in Chinatown in 2011, following that up with sister concepts, Kapnos and G by Mike Isabella, on V Street NW in 2013. Another location of Kapnos, Kapnos Taverna, is planned for Arlington's Ballston neighborhood, and Isabella also has a sandwich shop, G GrabandGo, in New Jersey. The…