The aim of this article is to provide you with some basic information on painting techniques for 3D prints, both those made with filament printers (FDM) and those made with resin printers (SLA), including the various stages from priming, through airbrushing, to the finishing varnish. What application methods are available? What are the different types of primer? What type of paint should I choose? What are the different types of varnish?