@emma @Inginsub @cassidyclown @bot
angle grinder would be much easier tbh. at least here low quality ones (they are more than good enough) are quite cheap. there are also softer pads if you want to test the waters to avoid marring it

or you could use an orbital sander ... for sanding something ...

the hardware store should sell various corrosion removers that are much more effective than vinegar

I guess you already got whatever else off of it but for future reference automotive brake cleaner is a good thing to try for metal surfaces. saves a lot of trouble with things that dish soap just doesn't handle very well