I wet sanded mine with very fine, and progressively finer sandpaper, then sprayed with clearcoat.
I'm to tight to buy new ones. I try to buff the haze off with Meguiar's PlastX $5 at Wal-Mart. I use a buffing wheel in a cordless drill. It will sling on paint so cover nearby areas with a rag. As stated above wet sand if buffing will not initially work. Cheap spray bottle full of water & some 2000 grit sandpaper. I have had good results with my tightwad method.
