I've polished it. The front side has thin scratches and some cloudiness on the top surface and outer sides of the plating. The rear side has more cloudiness on the top surface than the front. There is some plating剥がれ (peeling) on a part of the bottom surface. Please check the photos. There is a small crack and slight deformation on the upper part of the left side as you look at it. It doesn't feel flimsy, so I don't think it will affect installation or use, but please make your judgment based on the photos.