Tandanus
Aquarium Advice Freak
The wounds seem to be responding well to the large water changes and the double dose of stress coat.
I did another large water change then aded a double dose of stress coat and then dosed some Azithromycin.
Not to mention that you practically stripped your tank to clean it! (Oops...mentioned it!)
I am hoping that he will soon make a complete recovery. It's not a good feeling when you see a beautiful fish with a wound like that. I was having a good look at my big male today and I just love his metallic spots and his wicked trailers.