I'm asking here because you people seem knowledgeable. I have recently received an hardcover graphic novel that has a couple of dents on the cover edge. It's like it has been bumped onto something. The dents are on the edge of front cover, not on the dust-jacket (there is none). Is there a way to get rid of these dents? I have read people recommending to iron the book cover, at least to remove the creases around the dent, but I am really worried that the process might ruin it for good (it's a really expensive Sin city curator's collection signed edition). Any suggestion?