Found an old truck which had been cut into pieces. Owner gave me anything I wanted. I pulled the VIN plate from the right side firewall cowl. It's a 1946. Plate is steel; must have been galvanized? Stamped number is, of course, readable. The rest of the plate is mostly a medium gray haze. Holding it just-so in the light, I can read some of it. I'm afraid to scrub much with anything. Has anyone had much luck, "restoring," even some of the readability in these??? Tips? Thanks, Dennis