Curious about these scrapes on the cover of this comic. If I scrape it with a finger, it comes off in a white waxy substance (slide 2). Anybody know what this is, and is my cover damaged?

2 hours ago 3

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3. Curious about these scrapes on the cover of this comic. If I scrape it with a finger, it comes off in a white waxy substance (slide 2). Anybody know what this is, and is my cover damaged?