Greetings error coin aficionados. I am a new collector and wanted to get an opinion on this 2017 Frederick Douglass quarter. Is it PMD shenanigans or something else? I don't know how this could happen naturally at the mint so I suspect PMD. But none the less , being a novice collector would prefer a definitive answer. Thank you all for your time and patience.
I suspected blow torch. After learning about spooning coins yesterday nothing would amaze me Thanks Paddyman.
At first glance, it looks like it was exposed to something acidic, but I would defer to @paddyman98 due to his experience with errors.