Peter Gabriel s Scratch My Back album project is the first part of a series of song exchanges in which Gabriel and other leading artists reinterpret each other s songs. To help craft his recording of the album s eclectic array of cult favorites and classic tracks, Gabriel enlisted former Durutti Column member John Metcalfe, composer, arranger and the expertise of producer Bob Ezrin (Pink Floyd s The Wall, Lou Reed s Berlin ) and engineer, mixer and producer Tchad Blake (Suzanne Vega, Sheryl Crow, Tom Waits)…