On Wed, 26 Aug 2020 11:07:28 GMT, JohnP wrote:

What type of wheel do you suggest?

While the reply may have been meant tongue-in-cheek, there *are* some discs:
"Flap Felt Disc Metal Polishing Angle Grinder Buffing Wheel Polishers" will
work, using a suitable buffing compound. Or "Nylon Fiber Polishing Wheel Sanding
Buffing Disc Abrasive Wheels for Angle Grinders", as a first go if it's badly
scuffed.

(both found on leftpondian Amazon, .co.uk availability left as an exercise for
the reader...)

Beware that buffing wheels pretend to be benign and harmless, but can snatch
violently. A firm hand and cautious eye, and the sink will be buffed to a mirror
finish (and then will show every tiniest spot of limescale, YHBW.)


Thomas Prufer