Since there isn’t really a specific airbrush community, i’ll try dumping my issue here ok? I’m following the Q/A structure of the airbrush subreddit for completeness sake :)

Alright, so I just got my first airbrush for my birthday - for mini painting - and I’m getting very unreliable / unpredictable paint flow after an initial clog and cleaning.

Airbrush make and model

Timbertech ABPST05

Compressor make and model

Same name, came with the set. Running just over 20 PSI during open airflow.

Paint or other medium you are using

First some Vallejo Black Primer with Vallejo AB Thinner, then some Scale75 White which clogged.
Now I’m struggling with Citadel Shyish Purple contrast paint with thinner despite its already very liquid nature.

Have you done anything different lately?

After thoroughly cleaning (stripping the whole thing, running Timbertech AB Cleaner through the pot -> nozzle etc) I slowly started noticing unreliable spray pattern:
I open airflow, then pull back ever so slightly -> a thin stream comes out for maybe a second -> stops. I pull back a little more -> a slightly bigger stream, then stops.
Once I hit a “wall” on the trigger, it starts working a little bit better but still not entirely reliable.
No bubbles appear in the tank during this.

Have you tried using just water, tear-down and cleaning…

Just water feels like it’s working fine, just thinner also seems fine. I did a full tear down after it first clogged because that’s how a YT video told me is the right way to clean an AB after every use T_T
I’m pretty confident that I put it all back together right.

I switched out needle, nozzle and cap. I let some cleaner flow through the pot, out the front without a nozzle on to check the channel isn’t blocked.

Any advice would be appreciated!

  • shapesandstuff@feddit.deOPEnglish
    0·
    10 months ago

    Vallejo Black Airbrush Primer. I thinned it by eye 2:1 primer to thinner.

    I had no idea about this issue with primers though, so thanks!

    The main clogging issue was scale 75 white which seems to have gotten a bit grainy.

    I was also told about dry tip which might be it. I’ll know more later when it’s had some time in the soak

    • Boinkage@lemmy.worldEnglish
      0·
      10 months ago

      Yeah, especially with white it can get caked around the needle. I use that wire brush tool to scritch the hell out of the tip area periodically, especially with white paint. You can see it getting all caked up around the needle.

    • Bluesheep@lemmy.worldEnglish
      0·
      10 months ago

      It’s hard to judge any airbrush by white. The pigment used tends to be larger than say a red, so it clogs more frequently.

      If you have some primed models, after you’ve cleaned your brush use the paints you have rather than a primer. As someone else said, there’s an additive in the paint to make it a ‘primer’ and that has a tendency to stick tight to the insides of my brush.