A family member recently passed and I was given an old sporterized 1903 that he had. I was going to re-blue it and fix it up to be a deer/hog rifle. Imagine my surprise when I found a nice, shiny flat spot on the receiver where the serial number should have been. Yup, some fool ground it off. Since I don't really want to be in violation of the FFA of '68, I'd like to take a shot at raising the serial number with some sulfuric acid. Anyone out there got any experience with this? If I can raise the number enough to read it I'll have it checked to make sure it's not stolen, but if I can't I guess it has to go away. Too bad, it's got potential.