i'll look through my harddrive to see if i have the pictures under the wheel garnish.On the non visible side of the plastic wheel wells. I read on a post somewhere that someone did this and it cut down on road noise. Assume one would have to take off tire to remove the plastic liners but i did watch a video were a shop was doing this just not to a crv. Im going to work on the doors and see what else I get motivated to do..
When i did my retrofit and sport bumpers i had them off and believe i took pics.
not 100% sure
not sure i'd put deadening anywhere than interior.
Especially in an area that gets massive condensation and salt (even minimal)
Acoustical caulk .... definitely lol