my system hits hard but the buzzing coming from the back annoys me. Im planning on getting some damping material but after shopping around i'm a bit undecided as to what to get. ive seen mats, paste, and stuff in a spray can. which is the best to get? i still dont know all the places ill ned to put it but i know the trunk lid and liscnese plates will need it. also inside the car at the very back will need it but i dont know exactly where. i like the paste because it can be molded, sanded and painted which gives me alot of customization ideas but it will also be harder to work with. any help and past expierences will be appreciated.