On: Whiteboard sticker for your laptop

[felipebueno]

Staingate is a real thing and @achow's comment is correct and is very useful and that's probably what is happening with @component's mbp.

[component → felipebueno]

Sadly, yes it is "staingate"

Did a bit more digging and found a site [1] which has a gallery of affected MBP, showing the different levels of "staingate"

[1] http://staingate.org