I have seen pictures of a gun, very poorly engraved, that Jerrywh, first, repaired by filling all of the bad engraving with iron wire and second, completely re-engraved beautifully. You would swear, looking at the picture of the badly engraved original version of the gun, that it was completely and permanently ruined. After Jerry got finished with it, it looked like a completely different gun with beautiful engraving. He made me a believer that very few things like that cannot be completely saved by inlaying iron the same way you would inlay gold. I have repaired some casting flaws in modern locks by this method.