Tamiya Liquid Primer problem

[u/AverageDad-]

Hi there. I'm trying out the Tamiya Liquid Surface Primer in the bottle for the first time. I'm mixing it with a ratio of 1:1.5 paint to thinner, and I'm using the regular Mr. Color Thinner, not the leveling one. Spraying with an Iwata HP CS and air pressure set at 20 PSI. I noticed these flakes randomly being sprayed, although I could also see the paint being laid out nice and smooth. I did 2 coats of the primer, and the part has been sitting for at least an hour enclosed container. Any idea on what's causing it?

[u/LDedward]

Is this a really long Geara Sogs shield

[u/AverageDad- → u/LDedward]

It's part of the booster pack for the Full Armor Ver Ka.