There's a product called Polywatch which is used to remove scratches from plastic watch-glass. I have been impressed with it when used for that purpose. You could give it a try. I paid £5 for a tube at a Jewellers but I've also seen it on eBay.
As your hood is new you don't need a product that will restore the clarity of the rear window. If you do need to remove the haziness autosol chrome cleaner, Cif houshold cleaner or Brasso does the trick.
Last edited by uvk33n; 24/07/08 01:33 PM. Reason: Added Brasso