If you can get a fingernail in it, it’ll need a machine to correct it. No amount of elbow grease will shift it, unless you can polish non stop for a year or so... get yourself a DA, some Scholl S17+ and a medium pad to suit and it’ll come out. Unless you are spectacularly cack handed, and I mean by physically mashing the hard plastic of the machine into the paint, you won’t mess anything up.