Hi, I've also recently been looking into pain protection. I phoned around about 30 dealers yesterday and found the guy who applied the X-Pack, they can do it for about $300 (interior, leather, paint etc) without warranty (1500 - 2000 with warranty). Although i'm still very wary of what they use and how good it would actually be. Considering the labor work involved, it must only cost about 25$ -$60 for all the sealants.
From what i've gathered from forums, the best do-it yourself stuff (sealant) is:
Infinity Glare products (6-12months) (200+) for the pack
nanoplex products (8-12months +, 18,000k) (200+) for the pack
some people talk about
Paint Protection Direct - The ultimate paint protection and car polish for your car (Glassepex) who supposedly do a good job as well, although i couldn't find any reference to them other than on the internet. have they even got an ABN...
A lot of Americans are now using
www.nanolex-international.com if they seal their cars, although from what i can tell, all the nano sealants are all the same and probably come from the same supplier in Germany.
I did come across a few waxes (although i didn't write them down) that last 6-8 months. However, they take a lot more work to apply then DIY sealant. Therefore it would be probably better to buy a sealant that does not dissolve then put wax on top (assuming the wax wont erode the sealant)
Notes:
* I also phoned around some car insurance and manufactures and they all said they cant recommend any protection as there is not industry standard for it in AUS anyway.
* some sealants require the drivers to wax/condition their car at least once a month (mainly Teflon based)
* I had my old ford focus paint protected (supposedly life warranty), the sealant started coming off about 2 1/2 years later.