Of course I couldn't leave it at this and immediately started thinking about those speaker holes in my doors. I cut a blank big enough for two repairs:
Made a pattern from lightweight cardboard using a screw to hold it against the door's interior and traced with a Sharpie, then cut it out and started grinding for a "perfect" fit - yeah, well that didn't happen....but I already "know" how to fill small holes, right?!
Yes, I know to spot weld and jump around to keep from warping.