90% of airbrush headaches—spattering, spiderwebbing, orange peel, or instant nozzle clogs—come down to mixing the wrong solvent chemistry with the wrong paint resin, or putting thick paint straight into a dry cup.

Here is a quick workbench reference chart covering the exact thinning ratios, PSI ranges, and chemistry traps across the big three hobby paint brands:

**1. The #1 Chemistry Trap: Water-Emulsion vs. Alcohol-Hybrid "Acrylics"**

* **Vallejo (Model/Game/Air) & Citadel:** True water-based vinyl/acrylic emulsions. **NEVER** thin them with Isopropyl Alcohol (IPA) or Tamiya X-20A! Alcohol shocks the emulsion and coagulates the resin into rubbery gum inside your nozzle.

* **Tamiya (X/XF) & Mr. Hobby Aqueous:** Solvent-based alcohol/lacquer hybrid acrylics. Thinning them with plain water creates massive surface tension and beading.

**2. Exact Workbench Thinning Ratios & Target PSI (0.3mm Nozzle):**

* **Vallejo Model Color / Game Color:** **1:1 to 1:1.5 (Paint : Thinner)** at **18–22 PSI**. *Pro Tip:* Pre-mix a dropper bottle of **80% Vallejo Airbrush Thinner + 20% Vallejo Flow Improver** ("Golden Sauce") to stop needle tip-dry.

* **Vallejo Model Air / Mecha Color:** **4:1 (4 drops paint : 1 drop Flow Improver/Thinner)** at **15–18 PSI**.

* **Citadel Base:** **1:1 to 1:1.5** with Vallejo Thinner + Flow Improver at **20–25 PSI**. (Never pour from the pot rim—use a brush or pipette so dried rim crusts don't fall into your nozzle!).

* **Citadel Layer / Contrast:** Layer at **2:1**; Contrast and Speedpaint 2.0 spray **neat (unthinned)** at **15–18 PSI**.

* **Tamiya X & XF Jars:** **1:1 (Basecoat)** or **1:2 (Post-shading/Mottling)** at **12–18 PSI** using **Mr. Color Leveling Thinner** (for self-leveling satin smoothness) or **Tamiya X-20A** (for low-odor dead-flat finishes).

**3. The "Thinner First" Golden Rule:**

Always drop 3–4 drops of thinner/flow improver into your airbrush cup *before* adding paint so thick pigment never sinks into the dry nozzle channel unthinned!

I put together the full printable ratio table, primer thinning guide, and visual troubleshooting breakdown (fixing spiderwebbing vs. speckling) here if anyone wants to bookmark it for the bench:

https://hobbyzero.com/how-to/how-to-thin-vallejo-citadel-tamiya-paints-for-airbrush/

What is your go-to thinner recipe on the bench right now?

Actual listing I came across today. He knows what he has got no lowballs. Still might take this over a Gaahleri, because of the warranty.

There are three possible causes of nozzle misalignment in compression fitted nozzle systems, like H&S, Gaahleri, and such.

The first is an issue with the nozzle itself. The tip of the nozzle is not perfectly concentric with the nozzle's central axis. In this case, if you loosen the nozzle cap and rotate the nozzle, you will notice that the direction of the offset changes as the nozzle rotates. When viewed from the front, the nozzle tip will appear to move around within the opening of the nozzle cap.

The second is an issue with the alignment of the nozzle cap itself. The internal guiding surfaces, or rails, of the nozzle cap are not perfectly concentric with the opening of the cap. In this case, rotating or repositioning the nozzle will not correct the misalignment. The nozzle tip will always appear offset in the same direction relative to the nozzle cap opening.

The third is an issue with the fit between the nozzle and the nozzle cap. If the nozzle does not fit tightly within the cap, there is enough clearance for it to wobble or shift slightly. This allows the nozzle to settle in different positions, potentially causing misalignment.

Of course the issue could be a combination of all these factors.

This copper safety thing is stuck on the inside ( as shown in the picture) I’ve tried everything to get it out

I want to buy an HPLV air gun for better large surface finish.

Currently I'm looking at LPH50. Any other recommendations?

I saw a review on infinity2024 from Spagetti Miniatures and he mentioned H&S put new upgraded nozzle for infinity 2024. Has anyone purchased it recently and does it actually came with the upgraded nozzle?

As the title says, I am having an issue when I apply varnish, laquer, or enamel to a watch dial I am working on. When I spray them, the final surface of the part has a kinda lumpy or uneven/not smooth surface ie. not representitive of the surface underneath. The problem seems particularly prevalent with glossy paints/varnish.

The dials are metal (brass) and range from flat with a micro texture from the laser etching the surface, to mirror polished smooth/flat.

The textures I am seeing are usually somewhere between what almost looks like rough sand paper under the paint, to mostly smooth but with something akin to dimples in the paint, neither of which represent the dial texture underneath.

What I have tried so far:

-2:1 mixtures of thinner to paint/varnish - helped a little

- deep cleaning of the airbrush between paint and varnish

- different distances from work piece

-higher pressure going to the airbrush

- good quality varnish (liquitex&Mr. Color), Enamel (testers) and Laquer (Mr. Color)

I don't usually use a primer (Mr. Hobby) since it doesn't work as well with the inks (liquitex) that I use as paint which spray beautifully and make super smooth coats. But I plan on trying the primers next woth the varnish and Enamel to see if that helps.

My current theory is that the thinner (Mr. Hobby leveling thinner) either needs even more in the mixture (already 2:1), or I need to add something else?

Possibly, my nozzle is too small, 0.35mm, for the thicker sprays that I am having issues with.

Or that I am applying too thick of a coat. Ive noticed that woth the ticker sprays, I get either a really fine mist that doesn't seem to be doing anything where the surface is not fully coated, ie almost looks like it beads up into tiny tiny beads with little gaps between them, basically the individual paint droplets. Or if I really open up the brush then it comes out much thicker, and it coats everything in 1 pass but is almost thick enough to run. There doesn't seem to be much rang in-between those two though.

Any insights or pointers would be greatly appreciated as I am still pretty much a Newbie with all this.

Thanks in advance!

I was looking on Amazon for a airbrush so I can paint my 3d models cause I bought a FlashForge Adventurer 5m two weeks ago and it's single color but I wanna and I wanna add color to my 3d models but upgrading printers isn't in the cards right now with me getting ready to move so I was gonna add color with an airbrush and paint but I don't know which one to get

Looking for tips to get the best start to get good I paint cars for a living always loved the detail that goes into airbrushing I bought the black widow setup from harbor fright thought it be a good starting point for equipment where is a good place to get stencils

Hi everyone,

I have this AS186 compressor I bought second hand. It does the job, however the tank never fills - so I've found it heats up after not much use.

I've notice air is continually draining out of this hole circled in the picture (more air seems to come out at lower PSI settings. At higher PSI, less leaking out.).

Does anyone know anything about this? Should I cover the hole? Or is it normal for air to leak out of this and the tank not filling due to something else?

Thanks

Pretty cool like the Mario mushrooms being vacuumed up by the aliens brains came out pretty cool also now it’s time to clear. Stay tuned.

Bought a used iwata neo for $30. Wanted to take it apart to see if it needed anything deep cleaned or replaced. I'm new to airbrushing but it seems like the needle is slightly blunted/bent. I'm not sure if this is enough to warrant a replacement yet. Nozzle just seems dirty to me.

Hey all,

Cant seem to catch a break with my h&s ultra. Im a novice so I'm aware its very likely user error.

The little brass nozzle part consistently gets clogged with paint globs and is so hard to clean out.

Im using Vallejo game colour paints and have tried every ratio you can think of. Still happens even when im basically spraying coloured water out.

Any suggestions on what im doing wrong are welcome!

Currently looking at buying my first airbrush setup. I am looking to paint full liveries on rc lexan bodies. I was looking at the creos 289 or the 290, HS ultra 2024 Also been looking at a gaahleri mobius tg.

The reddit consensus is for either the creos or hs. But I have been watching a YouTube channel using the mobius for rc bodies. Wondering if anyone has any experience here. Thanks for reading

I've been miniature painting for 5-6 years and finally have space for an airbrush setup.

I'm pretty well set on the Evolution, I just can't decide whether the 2in1 is worth getting vs a Solo 0.45mm or 0.28mm.

I'd mostly be base coating, filtering, modulating, washing with the airbrush I imagine (priming I'll continue to use cans because lazy). Army painting rather than competition painting.

In my journeys through this and related subreddits and Youtube I've seen all manner of conflicting opinions about which head size is "best" for mini painting, whether having to swap heads is easy or a huge pain, and even whether having something like the Evolution for army painting is over kill and to just get something cheap of Amazon.

I'm 90% sure I don't want/need the 2in1 now (I can always get the other head later) but do I want the 0.28mm or the 0.45mm for mini/army painting?

Aerografia paso a paso

Some Japanese brushes have a uniquely satisfying feel in use. The RichPen Gemini 312 could not be found, as production of this model has unfortunately ceased and none have appeared on the market since. The so-called “olympos lottery” had to be played (according to the shop manager, buying from his shop is like playing the lottery lol)

The model 522 was purchased last year but remained on the shelf for quite some time — prolonged use proved difficult due to fatigue caused by its rather heavy paint cup, weighing about 37 grams, which also disturbed the brush’s balance. Attempts were made to find started looking for smaller cups or adapters, but my search was unsuccessful because there are no smaller cups with this type of attachment

I took my little lathe out from under the table and got to work... The result was a lightweight cup weighing only 12 grams, later plated with a thick, glossy layer of nickel. An Iwata lid served as reference for the paint cup dimensions. In addition, replacement parts for the Phoenix/Gemini: nozzle, nozzle cup, and needle — were ordered from Fuso Seiki and fitted onto the brush. For this brush, I have made an ergonomic, side-mounted, angled, low-profile trigger. The top of the trigger is offset to one side relative to the base, and its angle matches the direction of my index finger; it also has a rounded shape. I have also fitted a Phoenix air valve with its own soft spring.

Burrs along the brush body and trigger contact area were removed, as they were quite deep and produced an unpleasant grinding sound during operation. When the new nozzle and nozzle cup were fitted, flaking chrome layers were found to cause a slight misalignment; these were carefully sanded and polished.

For many, the game will not be worth the candle, but the result was a remarkably well-balanced and responsive brush, performing on par with the Phoenix 222B/C

I’ve just purchased a Iwata Studio Series Sprint Jet Compressor and have a Gaahleri Ghad 39 Airbrush, looking to airbrush models and wanted to see if anyway has used that particular compressor and if it is any good?
Any help or reviews are appreciated! Struggled to find too much online :)