This is probably a ridiculous question, but I searched and can't find an answer. I'm looking at getting a Damplifier B-stock bulk pack in the near future from Second Skin, and doing as much of my car as humanly possible. At least the hatch, spare tire well, and all four doors. What I'm primarily frustrated by is panel rattles on my interior (door panels and hatch trim on the inside all rattling at certain freqs high volume.)
The question is should I be applying the deadener to the inside of the plastic panels, or to the sheet metal/inner door structure if I'm trying to kill panel rattle? Any other suggestions besides Damplifier, I'm open to suggestion. I really want to get all these rattles in the doors and hatch under control, cause they are frustrating the shit out of me.