I recently misguided the LW200, partly sideswiping (in reverse) against a fence post. Caught the edge of the passenger side mirror and its housing is cracked. Also have a light but visible scratch about 2' along the side door. Short of a trip to The Dealership or indy body shop, is there an effective DIY treatment to fill or hide the scratch. BTW the color of the Saturn plastic is black. I seem to break materials that defy repair by all known adhesives. Any suggestions as to what might work to repair the particular plastic used in the mirror housing?