I used ppg's mix which my local supplier had the codes, not knowing any better I didn't do anything special in the process, don't wanna step on the TOP Cats toes, he evidntly put a lot of work into his painting, just saying I had good success with my regular amature method , was a one step shoot, no clear, Shot 2 coats over gray primer,I think the paint they gave me had two additives, I could dig out the bill if anyone needs the specs.
Now I didn't go over it with a magnifying glass & can't say how close to original it is, but it looked pretty good to the naked eye.