Welcome Chuck, you're gonna love this car! Try headlight restoration in the search feature, there will be several posts to look through. Pretty much it looks like if a "good" over the counter headlight restore does not do the trick, with their enclosed sanding disks, it would be time to use a more abrasive one starting at say 320 grit, and moving up to the higher 1000-2000 grit wet sand. If your not comfortable sanding the lights, then maybe a body shop could do them, for a good price. Id search the forum for the bumper removal, (not hard just a bit time consuming) to take your lights out for the body shop to sand em. There are lots of good posts on this, I kinda just gave you shotgun idea of what may be involved
2004 SSB 6spd Coupe, And......................Loving it!