Airbrushing thin camouflage lines on armored vehicles?

Reducing the pressure as low as 8 psi and thinning the paint down to as low as 75-25

Of course,to get better answers,the type airbrush and paint being used would help

I'm relatively new back to the hobby (started with it again last Spring/Summer) and I came across using blu-tack on this forum. I tried it for the first time on a Spitfire. I don't have any in process pictures unfortunately. I started out by spraying the grey first, lightly drawing the camo pattern with a pencil, running a blu-tack "snake" near my pencil line on the outside of where the green would be sprayed (so the paint covers the pencil line), then covering the areas that need to stay grey with masking tape. I used Vallejo paints and didn't have a problem with paint lift when removing the blu-tack. I let the grey basecoat cure for at least a week iirc. Also paint from above and not at angle depending on how feathered you want the camo lines. The diameter of the blu-tack "snake" will also play a roll in the feathering. Small diameter tight line. Large diameter more feathering. Here are a few pics to show how it came out for me.

Jay

Sorry. I didn't realize that you were trying to airbrush thin stripes. Can't help there. I haven't attempted it myself yet.

Jay

Some airbrushes have interchangeable fine or extra-fine nozzles or adjustable trigger stops to limit airflow. My beloved Badger Anthem has neither -- it's just a matter of thinning and enough practice to get the right 'touch.'

If you're new to spraying those thin lines, practice and experimentation with thinner ratios are your best friends. Practice on an old model, or even something like 3x5 cards. It's important to keep your spray perpendicular to the surface to limit overspray.

With just thinning, air-pressure regulating and 'touch,' I can spray pretty good 1/16" or slightly smaller lines with thinned Tamiya acrylics. But it took a fair amount of practice to get there.

Good luck.

My airbrush came with 3 different nozzles.

I'll try putting the fine one on and thinning the paint down more the the 50/50 I'm using now.

On the right track.  Turn down the air to where you are just atomizing paint, move in close, probably a lot closer than you would think.  Since you're using a mix more like water, go easy on the trigger.

As was said above, practice.  The practice pieces can be scrap, for sale signs, plastic spoons, take out containers, etc.  Untreated paper or cardstock will tend to soak up the paint and spread it wider than sprayed.