AdamsNew98CL

So i just took off my grill from the 98 and i look at the back and i see chrome, i take a little rubbing alchohol to the paint on the back and it looks like acura used the chrome plastic whatnot and just sprayed over it, ive tried rubbing it off on the front but no luck. anyone know anything about this and if it is paint, anyone know a thinner that wont eat away at the plastic?