What kind of compressor are you working with? If your working with a compressor that doesn't incorporate a holding tank.....you could probably do with out the moisture trap.

The regulator can be bought from most hardware stores.( WHOAH!That link was huge! Look up lowes.com kobalt mini regulator) Most regulators now incorporate a moisture trap and usually exclusive to airbrushing.

Dual action is best for fine detail and line work, but can be expanded for small coat work such as these tanks by either patience or using a larger nozzle and more blunt needle like a 0.5, 0.7 and so forth.

Single action is usually best for coating, blending, and maybe okay detail work....like camo pattern and highlighting.

Also, to considersiphon feed or gravity feed.

Siphon fed airbrushes allowlarger volumes of paint....but you don't get to use every drop.

Gravity fed airbrushes allow you to use every drop, but lacks significantly in volumes of paint.

Both are available with either types of airbrushes. Gravity is usually exclusive to detailing, except large paint guns used in varnishing/automotive/tanning. Siphon is most commonly found in the single action which is one among a fewother reasons why it's best for coating.
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