Can/Should I use Polywatch on my 1966 Chronostop crystal?

New member here. I've just bought a 1966 Geneve Chronostop (145.010). It's in pretty good condition given its age, but the crystal has some marks and scratches. Should I use something ike Polywatch to remove these? Or it is better to leave them to retain its authentic vintage look and feel?

Thanks for your advice.