Sorry, I didn't say there was anything wrong with with wrought iron, and I agree with your post. Hand forged rifle barrels were made out of wrought iron, and it's a pleasure to work with. However, whether it protects itself from rust or not, I don't know, I just speak from experience of finding items made from wrought iron, very rusted with the grain showing. I said in the post I know nothing of confederate horse shoes, and don't know if they were made from wrought iron. I do know that if wrought iron is pounded on cold it will split and separate, because I've done it. It's a pleasure to work with red hot. Back in the 50's you could still get re-bar made out of wrought iron and we used that for among other things, making horse shoes, actually swedging training plates for race horses. I don't have any wrought iron now, so I can't show a picture of what it does cold. If my thoughts on confederate shoes are correct, they will be able to see the grain in the rust. No grain, then there is some other reason for the shoes to break easily, which I would know nothing about. I will freely admit I have no book learning on the subject of iron and steel, my limited knowledge is actually what I've seen and done. After seeing the iron separate when cold, looking at the rusted stuff I assumed I was looking at wrought iron seeing the same type of thing, only rusty. After finding one larger item, which I believe was part of a spike for driving into a log for rafting logs on a pond, which I reworked it into a lance point, long long ago and far far away, but now have no idea where it is, so no chance at photos.