Okay, I am making an assumption (eek) here that by bringing back the full color of the suit, you mean making it darker and preserving the contrast.
Since the image is black and white I did the easiest possible method (in my opinion).
1. Levels adjustment layer to restore overall contrast.
2. Looked at the channels and noticed that the damage seems to be on the blue channel.
3. Added a Channel Mixer layer with monochrome selected, 50/50 red and green channels (you can play with these values to get something you like).
That's it, no cloning, healing, etc. If you like the sepia tone you can always add it back in when you are done.