can you hear the rattle from the inside? or when you are on the outside?

if you are hearing it from the inside over the sound of the stereo, you may want to start looking for the cause of the problem. hearing it from the outside is pretty normal for hondas.

well, you have to isolate each rattle then go from there. one thing that will rattle is the lic. plate. you can add a foam backing to where the plate makes contact with the bumper.

things rattle when they are hitting against something else, or if its something thin, such as sheet metal, flexing. either put something soft to prevent 2 hard surfaces hitting against each other, or put some weight on the sheet metal (dynamat, or the like).

it just takes a bit of time locating each noise.