Well that would be like using a paint cleaner on your cars paint, and NOT applying a coat of polish or wax afterwards to add shine and protection. Guys the blue magic plastic cleaner does wonders for your 93 & up sentra plastic headlights, but you gotta follow it up with a good plastic polish. The blue magc metal polish works good to seal in the shine and add protection to prevent any future hazing or yellowing. Mothers,Meguiars and Eagle One also makes some really good plastic polishes. Remember clean the headlights first with the blue magic then follow that up with a plastic polish. Your headlights will look 100 times better and you'll be able to see much better at night i sure can lol ...1997 GA16DE said:I use blue magic too and after I'm done it looks all nice and like a week later, it's back to yellow.