Reading lots about what to do when airbrushing between coats. Most of it tends to be offering options depending all all sorts of things. In general terms when airbrushing with either Vallejo Air with just a couple of drops of thinner and maybe a drop of flow improver what is the typical time between coats ? And should the airbrush be cleaned during this time ? Same for a 50/50 Tamiya acrylic ? Although I'll probably use the Vallejo and I don't intend to use a retarder