Barry, the last lacquer job I did the guy at the paint store dug into this private stash and handed me a couple of sheets of 3M 15,000 grit. I was told it was used in the air craft industry to repair plastic windows. This was about 10 years ago so all we had was 2000 in the auto industry. Anyway, I painted this 31 Model A (it was only a repair involving a few panels on a car I had painted about 15 years previous) and cut it with 1000, 1200, 1500, 2000 and then this 15,000. HOLY SCHMOLY GUACAMOLE!
First of all it hardly needed to be polished after the 15,000. But when it was polished it shined like a mirror RIGHT NOW
I looked into getting some but kept on coming up with dead ends. I finally just gave up. Do you have any buddies in the aircraft industry?