How do you remove scratches from clear plastic?

I have graded baseball cards in sealed plastic cases that have some scratches on it. Isn't there a chemical you can buy to safely remove scratches?How do you remove scratches from clear plastic?
you might try plastic polish from your auto parts store, used for headlights





there is also clear lense or lense coat for plastice glasses lensesHow do you remove scratches from clear plastic?
I would look into some kind of plastic polish.





http://www.tapplastics.com/shop/product.鈥?/a>





http://www.watchpolishing.com/





http://www.autogeek.net/motplaspol.html
A lot has to dp with how deep the scratch is. If you can feel it with your fingernail your not going to get it out with any polishes. One polish that we have pretty good results with at work is Novus products.





http://www.novuspolish.com/





But you might also just want to try polishing it with toothpaste.





http://www.g4tv.com/screensavers/feature鈥?/a>

credot siosse