Hey! I just got some autographs from the cast of back to the future at comic con. Long story short I just got home and noticed that there are gray silver spots over on my the signatures. I am guessing a sharpie bleed onto my item. I’m just wondering if there is anyway to take them off without damaging the signatures and what it would do the the value. I’m guessing it will come down and someone would be less likely to buy it if I ever sold it?