I have a sound deadener for my 63 impala package tray, but am not sure whether it should be glued to the bottom of the vinyl package tray cover or in the trunk to the sheet metal that supports the package tray?
Sound deadening mat is usually self adhesive and is attached to the larger metal surface areas of the car where it can absorb vibrations (aka noise). Coverage doesn't have to be continuous as a piece here and there breaks up the resonant frequencies in the car's cabin.
This is pre-cut specifically for my car. It is coarse fibers on one side and a dark dense material on the other. So, do I take the package tray (fiberboard covered in vinyl) out, glue the deadener to the metal and replace the tray, or do I have to lay in the trunk and try to glue it on from underneath? I'm hopping the latter, since my body isn't so flexible any more