My 2015 ED has some blemishes on the plastic/acrylic exterior panels that don't respond to regular cleaning. I have used Car Wash, Dawn, and a chamois with a lot of elbow grease. Nothing seems to remove these marks. It's almost as if the marks (there's a part that look like a handprint) have embedded themselves into the finish. Is there a way to remove these? I'm hesitant to use a rubbing compound or something that could eat away the plastic. Any recommendations?