The McLaren paint is done by Sikkens (Azco Nobel) but when I contacted them for my Series IV Aero they were not willing to give details of it out, as they considered it part of their IP.
Heico Sportiv, a German firm who tune Volvo's, had an S80 at the 2007 SEMA Show in 'painted aluminium' and were much more helpful and I actually bought paint off them, two components to make up a litre equivalent. Like most of these special paint finishes, including my current Aero's Rocket Red, you start of with matt black undercoats, and then gradually build up the coats to the finished article.
Unfortunately, MMC were not happy with the finish they were able to obtain and I decided not to go ahead with the paint finish (or in the end the car) and ended up with a Liquid Mercury AeroMax.
The other main down-side of ordering these paints is the cost, they tend to be horrendously expensive and for an Aero Morgan charge £10,000 or $16,000 for such a special finish and even when you pro-rata that for a Trike, it's still going to cost an arm and a leg!
Sorry for no photos, maybe I'll add some later, as I am on my iPad and in a hurry, but if you'd Google Heico SEMA 2007 you should find the car that I'm talking about.
Photos added:
