A few months ago I noticed a small orange mark on the bottom right hand corner of his shell. I can't remember it being there when I first got him (3 years ago). Plus He has not been near any paint or anything. It certainly doesn't bother me if he has a little marking and it's not affecting...
That's good to hear. My first tortoise had a respiratory infection and he was also given antibiotics. I was told that those types of infections never get better/can't be cured and the antibiotics only prevent it from getting worse. I Don't know how true that is....he did die a few months later...