theres a pretty cool aluminum mesh available that forms to shape pretty nicely, I did an acura once & it really can conform well without distorting, I had the emblem sunk in & the crossbar sunk in, hard to explain but really looked way better than flat. when it's curved & concaved like that it gets pretty ridgid, so even though it forms easily it doesn't get deformed very easily... plus, being aluminum, if you want to leave it raw it looks nice... hit it with a little wheel cleaner once in a while & it looks good.... I used this mesh on my other car too & just pushing it into the opening & shaping it a bit it looks much nicer than just flat.
I got it on ebay a while ago.. I'll see if I can find the seller if your interested in it, he had several patterns but the tight diamond pattern was especially nice...