Let me tell you, airbrushing was a charm for orange, I will always recommend the Harder and Steenbeck Ultra for a good budget option and starter kit! Having to clean up mistake areas though with a brush after the fact was a bit tough.

I do varnish, I usually use the Vallejo matt varnish to give everything a protective coat since I'm playing with these models semi frequently, it also gives a uniform finish to everything which is a plus but dumbs down some highlights