I've a cast iron multi-burner stove. Over the past twelve months its got a bit sickly looking; the colour has gone out of it and, well, I'd like to give it a face lift and I suppose this is as good a time as any to do so.
It's a matt finish any ideas as to how to bring back the original colour. I was reading somewhere about colloidal black cleaner but have no idea what it is. It is advertised on Amazon but I'm none the wiser. Any advice?