Sonus Faber Finish Maintenace

I have the Amati Futura, too, red violin with the nickel chrome tops. The red violin finish is in perfect condition, shining like new. However, one of the nickel tops shows some light lines when in the sun, traces of when it was wiped. I wouldn't call it scratches, but they don't wipe off. What would be a good way to polish the nickel?

Walnut oil wipe on let sit a few hours and wipe it all off even if the finish is poly the wood under will absorb some oil and thus look better and last longer just use care around the drivers.

Thanks @johnk however I believe you are referring to the wood part. The wood is in perfect condition, I am talking about the top plate, chrome/nickel, that has some visible traces or minuscule scratches that show in direct sunlight. Some kind of polish maybe? I don't dare experiment with any random polish product.