[Drivesthebeast]

MY Dad's Topaz had/has the same problem with the headlight lenses and the waterfall "lightbar" grille. He uses NOVUS plastic cleaner and waxing compounds. They are speciffically meant for applications like what you want to do. I also use it on my headlights on my Focus sometimes to help remove minor scratches and buff them up. It also helps create a smoother surface that makes it hard for them to become sandblasted.

Not sure where to buy that stuff, but my dad does...I'll try and find out for you, but I think it comes from UAP NAPA, or somewhere else that sells a lot of bodywork products...