I use Tamiya acrylics thinned with IPA at 1:1 ratio and it always comes out… rough? It’s never a smooth surface and after few layers it gets kinda powdery, too rough. I tried different pressures and different thinning ratios, but I can’t seem to get it right. Left side of the picture is cca 20psi and right one is cca 12-15psi. Airbrush pros, help me out!