There's a rippled bend in this faceplate. Unclear how previous owner damaged it. The back of the faceplate has a vertical indention. I'm not sure if the indentation on the rear is a point of impact or where someone clamped it and tried to bend it back in position. Thoughts on what caused this? To what extent can the ripple visible from the front side be flattened out? (I'm not concerned about the indentation on the back which no one sees.) And if it can be fixed, what is the best approach to do so?