SEAT Arosa headlights made of acrylic glass

Hello guys! This is my first post. I have recently bought a seat owner. Have bought the little one used. The only thing that bothers me are the blind headlights, this is supposed to be a disease of the model, that the plastic disc becomes completely matte by rockfall at some point and looks started, do you have experience with it???? Can you help with a polish get the headlights a little clearer again? Are there replaceable GLAS headlights? And if so, where are the special rs cheap and can I install it myself??? Would I be happy to get answers 😉 Brena