Marked Cards

Is there anything that can be done with marked cards outside of buying a new deck?
A couple of cards in my deck are showing some faded out areas on the back of them.

No, I don't see what you could do. Attempting to "fix" them in any way would just mark them more obviously.

If some of the cards get that bad, it's time for a new deck. That is if the stains/marks/fading bothers you! Some don't mind that and think it gives the deck more character.

Hum...i don't mind my decks worn. In fact, i kinda like it.

I don't spread all the cards on the table and pick them one by one. When i finish shuffling and cutting, i draw the cards directly from the top of the deck. This way i can't 'cheat' if i recognize this or that damaged card. I don't choose them - they cards come in the order they are after the cut. I suppose you could do the same.

Just don't look at them when you shuffle and cut.
C'mon, they're just getting broken in!