One example of discussion of torching Ithaca receivers was in Frank Conley's book, page 131, a letter from Fausto Gentile to Bill Mains, among other subjects, a discussion of torching receivers and the related problems. I sold a wonderful old 4E to a fellow club member years ago. He sent it to Ithaca for refinishing and restocking to a higher grade. It came back with a ruined, torch colored receiver and a high grade stock obviously retrieved from the "takeoff" box and installed on his gun. It was severely chipped at the receiver and not refinished.