You can bring them up even better if you use a Brass Wire brush drill attachment but if you use this method you MUST wear overalls and safety glasses/googles.The Brass wires can come of and stick in cloths and scar the skin and the Safety Glasses/Goggles for the eyes.
Brass wire brushes can remove a lot of the final corrosion and leave a nice,"Burnished" finish or if once used and you don't like the finish the Metal polish usually works even better after the Burnishing.
https://www.toolstation.com/wire-bru...xoCZjgQAvD_BwE
£2.51