Just take it to the dealer and have them look at it...since noone can see it its hard to tell.

 

you need to use an aggressive polish and work your way to a super fine polish then finish it with a paint sealant.

This is the place were I get all my supplies for when I detail cars. I haven't found anything that compares.
http://www.griotsgarage.com/catalog....1004&SKU=11560