My wife's '95 Nissan Pathfinder has a wind deflector above the rear hatch. It was a flat/satin black. Three fourths of the black has faded away. What is left is silver. It appears to be aluminum. Sorry, I didn't try a magnet test and the wife is off with the car right now. Can a body shop repaint this or was it anodized and must be replaced with a new deflector?