I picked up a fog light cheap off Ebay but it's pitted pretty badly.
I thought about trying something like these diamond pads then use the ceium oxide
http://www.ebay.com/itm/Diamond-Polishing-Pads-4-inch-Wet-Dry-8-Piece-Set-Granite-Stone-Concrete-Marble/121653206795?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20150313114020%26meid%3D27f56819eeb84d14938a02361e6b9369%26pid%3D100338%26rk%3D1%26rkt%3D29%26mehot%3Dpp%26sd%3D181992188516