Put new metal in "I guess"? I would endorse that if for instance they are say replacing maybe "ONE OR TWO PLACES" on the car where the VIN "WAS". From there, the question to me would become, is the car "STILL A CAR" anymore, because it would have to be pretty tore up.
I question the legality of it. I don’t know if that would fall under the law that says you cannot reproduce a VIN. I get that it’s on sheet metal but the fed law requires VINs on multiple parts of the body so I can’t imagine re stamping would be ok.