[sick472]

I don't use undercoating, even for undercoating. Not that it's bad, I just prefer industrial enamels and I tend to brush it on rather than spraying it. That's the bare bones...

You can take it a step further and use a Dyno mat like product if you want to deaden some sound. The brand names get expensive, but most box hardware stores carry the Peal and Seal Roll Roofing. That's what I use and it's really hard to tell if it does a lot of good, but the sound of mind is satisfying enough (no pun intended). The mats don't really absorb sound so much as they reduce sheet metal vibrations which reduces sound. Then I put the oem-like tar pad, jute, & then carpet. I use way more than I need to, but I tend to over do it, it's pretty cheap, and it makes for a cool picture even though it all get's hidden...