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It's a decal you can buy on amazon, not some one-of-a-kind paint job.
Looks real to me actually. It does have the compression pattern around it, but that's just a result of the poor image quality/high contrast difference. The thing that would be suspicious is if those decals DIDN'T have those pixelated edges and were instead perfectly clear. It's also shaped pretty well to the shape of the dent and the sticker isn't a uniform black. Also, this sticker is an available product (funnily enough, this amazon listing has a very poorly photoshopped image)