I had really good results today using Meguiar's #10 and #17 plastic cleaner and polish, can't remember which number goes with which, refurbishing the windshield on the boat I'm restoring. Not wanting to plug anything here, just let those facing the same situation know what works really well. Still have some scratches, but otherwise it looks almost brand new and no cloudiness. Easy application, just like waxing/polishing a car or boat...cost was easy to live with, too. Less than $25 and barely put a dent in either bottle of stuff, will have this around to use for awhile. Anyway, just sharing a good experience with a good product.