Hi Auf los!
this is a 2K primer (2 components). You will only get rid off mechanically. But that means in general to harm the ABS plastic structure.
So i would suggest to learn how to spray

– which is easy – or to bring it to a local paint shop for spraying.
Spraying means 90% preparation and 10% spraying. You can get good results with a spray can, but you will not get lasting results, because if you use a 2K paint the paint will be more adhesive and durable and if you use a pro spray gun the paint spray will be much finer, which also means a much adhesive result and a better paint picture (hope that is the right term – means a much finer paint surface.) Also 1K paint doesn't always adhere to 2K primer very good.
Regards, Markus