Road noise seems to be a problem with these little cars. I have noticed it seems to come from the door edges. I have already put a layer of sound deadening foam in both doors. Last week I decided to quiet it some more.
I went to my local Advanced Auto Parts store and picked up a roll of peel and stick weather stripping. I cleaned the inside edge of my doors with alcohol, then applied the strip. Right of the bat I noticed it was quieter. The next bonus was the reduced amount of dust in my door jams. All this for $7.89 , who would of thunk it?
And yes the door is a little bit harder to close, but not onugh to make you have to slam it.