That's what I thought poleking. No harm in asking though.
I tend to use wet and dry 2500 grade sandpaper. Shifts it in seconds.
Try a bit of Cif and a sponge before the sandpaper bud.
It's much less abrasive.
The sandpaper is fine-if you're gonna seal it after (not that you don't...)
But a quid for some Cif and a sponge is much easier IMO.
And the customer won't (possibly?) be as shocked.
And...decant the cif into your own container and do the job. Customer (probably
) not ask you what the cream is so you'll get the job year after year but if you look like you just sand it off-they may be inclined to try that themselves & scratch the life out of them.
Unlikely? Perhaps. But I wouldn't risk it.
Each to their own though bud.