How was it restored? Did you use a dremmel on it? Did you see any grind marks on the blade? I have had blades do this and I have found 2 things from it. 1 the metal has been heated through polishing or grinding and now won't hold and edge. Sometimes you can remove some more metal and it works again and sometimes it is just dead. 2 you are doing something wrong in honing like building a wire edge that when going to high grits or shaving with it causes the razor to go dull when used. So tell us a bit about how you fixed it up and how you hone it plz.