Just thought I'd let you guys know of a relatively new (I think) product which I had fitted to my GTP a couple of weeks ago.
It's a clear plastic-type film that is applied to all the front impact surfaces - all vertical surfaces on the front bar; forward-facing side of the side mirrors; sills; 300mm wide strip accross the bonnet; all lights - including fogs. I also did the door handle recesses, top of rear bar where you load the boot, and a fine strip along the rear-edge of each door. This is not the same stuff as you have been able to buy to protect head lights for some time.
It is a bit thicker than contact (school book covering stuff), but more rubbery in texture. It is computer cut, then slid on via a wet adhesive type stuff, then it dries to a damn-near invisible surface that will protect against stone chips and head/fog light breakage.
If it wasn't for the strip on the bonnet only being about 300mm wide - thus being able to see an extremely fine rear edge, you could not pick it had been applied by just looking at it. The fine line across the bonnet can usually only be seen when the car is dirty - and dirt builds up along the edge of the plastic. It is also easily removable without damage to the paint etc.
You treat this stuff just like your paint - wash it, and polish it if need be.
Here's the URL - http://www.stonegard.com.au/main5.html
Cost was about $550 for the full package, but they have several slightly cheaper packages for less coverage. I believe its also gauranteed for five years etc
Having had a good quality traditional Carbra for my old HSV - which got put on once during the 5 years I had it, the extra $220 for this stuff was well worth it.
BTW - these guys washed and gently buffed the whole car prior to putting the stuff on, then washed it again when finished!!
I got mine done in Sydney (Rydalmere), and I think they may do Melbourne as well??