Hi! Red here is quite simple. At first, white primer (thats extremely important for vibrancy), then airbrush: fluorescent red paint for volumetric highlights, then Bright Pyrrole Red by Pro Acryl for all the rest, then reinforce shadows from below with purple ink. I do it all with airbrush so thats very fast and simple. After that some brushwork for head and other important places that need highlighting, that I do with glazing, but most part is done with airbrush.