Got little yellow paint on the edge of the left low side the black part,get off on 2013 Ford Escape

What can I use to get it off of the lower edge of left door? My grandson got it off the painted part of the door but not lower part as that part of the door is like black plastic?

Asked by for the 2013 Ford Escape
1 answer
I think he went to primer , got to get touch up paints...