I was fine micro-scratches on the tank top because I had put a bag over the container and the metal parts are lightly scratched the paint around the fuel cap. These scratches were very thin, at the lacquer layer.
The product removes scratches. I then added a thin layer of varnish to protect, and the result is impeccable: even closely we see no trace.
The same product was sold to the dealer in my town for 2.5 times the price ...