I am new to painting models with an airbrush but not new to airbrushing. Before I painted using a brush or rattle can. I would like to know if anyone has ever painted in layers. My plan is using my airbrush to prime the car, sand it, paint a few layers of pearl and then then paint it again with a few layers of transparent blue. I was wondering if anyone thinks I should sand the Pearl before I apply the blue? I have noticed a few oddities in my pearl coat, such as what appear to be scratches. I am assuming that If I do sand I need to wet sand or at least use a super fine grit. To let everyone know I primed using AK interactive white surface primer. I will be using Golden's new High-flow acrylics. I am going to use the Iridescent Pearl (fine) and then transparent Phthalo Blue (green shade). This project is also serving as a test bed to see how the paints hold up and act.