Question about replacing area behind back seat

[scherp69]

I'm thinking that one thing I might do over the winter is replace the sheet metal that is behind the back seat and separates the trunk and the inside of the car. I've included a picture of the area I'm talking about. It's the area in red. What my question is...would I be okay just putting a flat piece of 18 gauge sheet metal in there or would there be any benefit to buying a bead roller and running some beads into the sheet metal? There's a bead roller on sale right now at one of the local tools shops, just not sure if I need to spend another $150 right now on tools if I don't need it. I know it would look better with the beads, but once the seats are in and the stereos in the trunk, you won't see that area anyways. I want to replace it to get rid of the hack job I did years ago when I mounted a couple 12" free air subs. Thanks in advance.

http://i222.photobucket.com/albums/dd68/scherp69/P1000380a.jpg

[War]

I'm technically the wrong guy to answer this. I don't believe in the words "you won't see it anyway". However the beads are to give the piece some ridgidness, the design is up to you. So yes you can use 18 ga and yes you should roll it in my opinion.

[JKnight]

Yeah, I think the rigidity tends to be important on that particular piece in order to keep it from acting like a drum, among other othings. I would just patch what you have.