rear deck panel rattles
 

The rear deck panel where the 6x9 speakers are located rattles while driving around.
Im sure everyone sooner or later has this issue, anyone find a good fix for it ?

I removed the panel and put two layers of sound deadening on the sheet metal. It helped to get rid of unwanted resonations ALOT and most of the rattles. There's still one metalic sort-of rattle when the bass hits a certain note. Meh, i can live with it. Just need more bass to drown it out :D