I just used a metal flake gun for the first time. I need to practice more but one thing I need to do next time is lower the air pressure.....a lot! I think I over loaded the tank with flakes and it's always a problem to sand it without making damage to the flakes. I'm attaching a pic of my last flakes job. The little white dots are flakes that turned white because of the sanding. This is my sencond flake job BTW and I had same problem the first time. I burried the flakes under a lot of clear and still had this problem and never got a real smooth finish. The first time I applied the flakes manually with a home made shaker.
I'm not painting cars or motorcycles. I'm painting steel sculptures with not a lot of surface area. The largest area I might paint at one time would probably be about 3'x3'. Would the above compressor be able to supply enough air to the flake gun?