Piano cleaning

can a polish for varnishes be used if the piano is polyester polished? Otherwise, for shellac polishes, only a cloth after two days from when fingerprints were left.

but isn't polish a product used for cars?

Yes. It is the lightest abrasive and polisher. The important thing is that there are no other components inside... like wax or binders. Light polish. However, it is a job for polishers and you need to know how to apply it. It is nonetheless advisable to try the product on a small area and not in plain sight. Bye

Thanks Paolo, since there are various types available on the market etc.

could you indicate some suitable brands or send a photo of a product that you consider

adequate for this use? (The other day I went to an auto parts store asking for polish, he didn't have it... anyway he says to me: what do you want, to make the black keys turn white too..?!?? )

Black keys if in ebony better not to touch them.