• I can't tell from the pics what's going on there, but it looks like the skin has debonded from the core.

    If that's what has happened, Use a two part adhesive to stick it back down, something like Araldite or Double Bubble. Don't need anything mega strong but don't use solvent based. Use a lolly stick to poke some adhesive down between the skin and wipe off any excess.

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