Looks very interesting but like you said you need to buy a gallon ($250) and find somebody to re-spray the clear coat on your car AFTER all the prep work. Might be something to look into if you were having work done anyway but unless you find a specialty shop I doubt you'll find normal places using it as customers won't want to pay the markup. Shoot them an email and see what they say about local users. You might be able to hook with a place that does "custom" paints and airbrushing to see if they're willing to try it out.
Totally different (but still nano type stuff) I started using Ultima Paint Guard plus on my cars and I can tell you that plain soap and water washes brake dust off my rims, bugs and bird crap almost rinse off. I can't say how long it lasts because when I wash and dry the car, 10 minutes later the Sequoia (not a small vehicle) has a fresh coat on it and I don't need to go back and buff anything off!