ORIGINAL: Ex Skyline
Strip the lot out and buy some ear plugs [8|]. Aluminium tread plate is the way to go [8D]!
No true rally team will use tread plate
(although my RST I am afraid to say does have tread plate, ready to be removed :/).
Anyway, back on topic. Flashbanding was not too bad all that long ago but compared to a good sound deadening product (like Dynamat Xtreme, MaxMat, SecondSkin Damplifier Pro, and Skinz to name a few) it always came a poor second. A test once proved that you needed 4 layers of flashbanding to get an effect acheivable to 1 layer of DX, SecondSkin etc. I would agree on that and even friends who swore by flashing tape would not go back now after taking the plunge. The fact that a relative could tell the difference between the car without me informing them speaks volumes. The proper stuff is also dead easy to apply in comparison (on the Stag I did the pikey thing and used flashing tape, and Lord that was awkward (plenty of hairdryer action (heat) was required for the tape to even adhere).
However the best thing to do is to have a combination of deadening materials. Something like Skinz where the panel will flex (middle of the floor, other thing flexible metal spots) with thick underlay like material). These two products used in unison make for a surprising difference.
Saying that, in my old car, simply doing the doors and parts of the floor made a surprising difference inside for refinement.
