Here is what you can do with a photograph of this sort. Trouble is, since I like all the results I am the wrong person to choose just which one is the most effective. So lets take a poll, which one do you like?
It is mostly untouched. The color variation is from time and fading. I played with it a little in some painting programs and decided it was better "Au jus" (in its natural juices) so I posted it with the scratches removed only :