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Varnish gone very wrong

6 replies
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  • Member since
    May, 2017
Varnish gone very wrong
Posted by Warley on Wednesday, May 10, 2017 3:18 AM


Got a small problem with my first build in 20 years. My first ever try in airbrushing Big Smile

Using Vallero model paint and varnish.

I had the car painted to an okay result, forgot to cover the car in the drying time Confused so There is some dust problem here.

When i started to varnish the car i noticed Thats the layer dryed allmost at impact, so I thinned it a bit more, i could see that it helped a bit. After 2 minuts or so, the gun or the varnish began to lay a milky white layer and a lot of it... why ? It ended up Looking like this 

Hood of the mini

Is there a way to save/recover this "gone wrong varnish" spray ? Any help would be appreciated. .

The preassure was at around 2.2. With a lower preassure it wont spray the varnish. Mixed at around 60:30..

Im a littel proud of the white roof. first time airbrushing.

I have shared the lib in photobucket, so you could see more pics of this problem.

Thanks in advance. 

Dann  (Barney/Warley).

Learning from my mistakes. I hope OopsWhistling

  • Member since
    January, 2017
Posted by damouav on Thursday, May 11, 2017 5:14 AM


No major issue, we have all made "hiccups" when starting airbrushing.

Maybe the easiest way to come back from this would be to buy some Windex, pour it into a large container. Submerged the frame into the windex so the entire frame is covered in Windex and leave it for 24hours. The windex will safely remoce the paint and leave the plastic unharmed. You can then use a toothbrush to scrub the body clean and start again.

I assume you used Tamiya paint for the base coat, what did you use for the Varnish?

I dont think sanding is going to help, better to start again. I would suggest that you thin your Tamiya paint around 40-50% with either X20A Acrylic thinner or better still Tamiya Lacquer Thinner.

Not sure about your clear coat so cant make a suggestion.


  • Member since
    May, 2013
  • From: Indiana, USA
Posted by Greg on Thursday, May 11, 2017 9:58 AM

I thought I'd responded to this. Geez.

I agree with Damian re the windex soak to strip the varnish.

Vallejo varnishes will work, but they are tricky to airbrush IMO (I've abandoned them even though Vallejo is my go-to paint). I do use the matt varnish for quick brush on touch ups. Other than that, I think there are other products that would cause you less trouble, especially as a beginner airbrusher.

I remember having some pooling and milky white issues with the stuff too. In short, it does appear that you've applied the varnish way too heavily. You need to spray it at 20-25 PSI (sounds high, I know), keep the trigger wide open or nearly so (if you are using a double-action brush) and keep that airbrush moving just as if you were spraying with a can. Don't stop, slow down, or reverse direction or you will get pooling. Start off the model, depress trigger, fan across and past model without pausing or stopping.

Folks will likely post opposing opinions that light several light coats are better, and they may be right. I've just never been able to make that work with any clear coat.

Good luck, you'll get this. I have found clear coats to be much more finicky than I'd ever expected. Don't despair, it'll come.


  • Member since
    January, 2017
Posted by damouav on Wednesday, May 17, 2017 4:10 AM

Just checking your progress, have you tried the before mentioned suggestion!

  • Member since
    March, 2003
  • From: Northern New Jersey
Posted by Tojo72 on Wednesday, May 17, 2017 5:51 AM


Just checking your progress, have you tried the before mentioned suggestion!


It surprising how many posters never acknowledge the help they receive no less then get back with results.Sometimes it might discourage some from doing research to help out.

  • Member since
    January, 2017
Posted by damouav on Wednesday, May 17, 2017 6:34 AM

Double post...

  • Member since
    January, 2017
Posted by damouav on Wednesday, May 17, 2017 7:44 AM

Agreed. I actually didnt mean to post twice...

I have received extensive assistance from the members of FSM and I hope I thanked all for there input.

As you say, its just polite.


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