Celaning Black plastic molding and grill

I've had great results with Black Again. Here's a shot of the car after a Black Again treatment. All plastic was treated (not the tires). A before shot would have shown slightly greyed plastic, but without any real damage or white stains. You can tell by comparing the lower plastic front valance to the painted mid-part that it gets the plastic pretty black. One month later it still looks great. I haven't used the Mother's, so give both a try and let us know!