Hi
I'm sorry this has probably been discussed to death. I've always struggled airbrushing Vallejo model color, I find it dries very quick on the nozzle and clogs, I get a few minutes of spray time before it packs up and I'm pouring away paint, then stripping & cleaning. Spraying their primer isn't so bad, but it still clogs after a short time (I don;t usually thin that).

I usually do about 10% flow improver, 20-30% thinner and the rest model color. I've heard that a good mix is to just go with 50% flow improver, 50% model color though, has anyone tried this?

Using a Iwata Neo spraying at 30 psi.

Vallejo Model Color is usually applied with a brush while Model Air is designed to be airbrushed. They recommend 15-20 psi and I've never shot it at more than 25psi.

https://acrylicosvallejo.com/en/categoria/hobby/model-air-en/

https://acrylicosvallejo.com/en/categoria/hobby/model-color-en/

I also add a drop or two of their paint retarder to the mix and that has helped a bunch. YMMV. Thanks

https://acrylicosvallejo.com/en/producto/hobby/auxiliaries-model/retarder-medium-70597/

HTH

I can tell you that I mix about 50% paint 40% thinner 10% flow improver.spray at about 25-30 PSI
I realize everyone has their favorite formula,you really just need to keep experimenting until you get your ideal mix.

I've found too much flow improver yields longer drying times and a softer finish. but as has been stated, apparently everyone gets a different result.

yeah, forgot to say to add that. I did learn that humidity can really affect acrylics. Never had much worry with enamels but a couple winters ago I found my house was a bit dry and Vallejo model air was drying too fast. I often heat with wood and that can drop the humidity in my house quite a bit. So I put an extra drop of retarder in each cup and a couple hours before I'd start painting I'd put a pot of water on the wood stove to bring the humidity back up.

As Patrick said, Model Color is more intended for brush -although it can be airbrushed also.

It is quite thick so 30% thinner sounds too little to me. And half of Flow improver would be too much (it is recommended 10%)

I have been able to airbrush it using their airbrush thinner plus Flow Improver, cannot tell you exact ratios for the thinner, but 50% or more for sure. I would say it depends also on the color, age of paint, etc.