Before I flip the template over to paint the other eyebrow I ensure that the paint on the template is completely dry to avoid any smudging on my work. My next step is the nose cavity. I can't seem to find a perfect shape to use as my guide but I have one that has half of the shape that I require so instead of following the shape all the way around I stop just before the point I need.  To avoid any overspray in the areas you do not want painted face your airbrush in the opposite direction.   Also be aware that you should stop your stroke before you would like it to end.  As the overspray always goes further than you think. You will be more aware of this after your first attempt at using a sheild and it takes a bit of practice to master this. As you can see in the diagram I have flipped the template over and painted the other side of the nose cavity. For an even transition I have lined the template up with the section I previously painted.